According to Au7o's analysis of 8,181+ owner reports, the 1994-2026 Jeep Wrangler has 78 documented known issues, with 31 rated critical. The most serious are Steering Stabilizer Failure/Death Wobble ($100-$2,000 repair), TIPM (Totally Integrated Power Module) Failure ($200-$1,200 repair), 4xe Engine Sand-Casting Contamination — Loss of Propulsion / Engine Fire (Recall 25V-766 / 78C), Manual transmission clutch pressure plate overheating / fire risk (recall 21V-028 & 23V-116), Wrangler 4xe PHEV high-voltage battery fire risk (recall 23V-787, park outside), TIPM (Totally Integrated Power Module) failure — fuel pump relay & random electrical faults ($100-$1,200 repair), Death Wobble: violent front-end shaking at highway speed (solid front axle) ($150-$1,200 repair), Insufficient Child-Seat Tether Anchor Welds on the Second-Row Right-Side Seat Frame (Recall 26V224 / 27D). at .
Chrysler (FCA US, LLC) is recalling certain 2021-2024 Jeep Wrangler and 2022-2024 Jeep Grand Cherokee vehicles. A hybrid control processor (HCP) software error may cause the defrosting and defogging system to be inoperative. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 103, "Windshield Defrosting and Defogging Systems."
Campaign #24V11100015/02/2024
AIR BAGS:FRONTAL:DRIVER CLOCKSPRING/SPIRAL CASSETTE
Chrysler (FCA US, LLC) (Stellantis) is recalling certain 2023-2024 Ram 1500, Jeep Wrangler, Jeep Wagoneer, Jeep Grand Wagoneer, Chrysler Pacifica, Ram 3500, Ram 3500 cab chassis, Ram 2500, Ram 4500 cab chassis, Ram 5500 cab chassis, 2023 Jeep Gladiator, Jeep Grand Cherokee, Jeep Grand Cherokee L, Ram 3500 Cab Chassis with a GVWR less than 10,000 lbs., and Chrysler Voyager vehicles. The steering column control module may not be welded properly, which can prevent the driver's air bag from deploying in a crash. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
Campaign #24V19900014/03/2024
STEERING:HYDRAULIC POWER ASSIST:PUMP
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According to Au7o's analysis of 8,181+ owner reports, the 1994-2026 Jeep Wrangler has 78 documented issues. The most frequently reported are: Steering Stabilizer Failure/Death Wobble, TIPM (Totally Integrated Power Module) Failure, 4xe Engine Sand-Casting Contamination — Loss of Propulsion / Engine Fire (Recall 25V-766 / 78C). Of these, 31 are rated critical and should be addressed promptly.
Is the Jeep Wrangler reliable?
The 1994-2026 Jeep Wrangler has 78 known issues documented across 8,181+ owner reports. 31 issues are rated critical: Steering Stabilizer Failure/Death Wobble and TIPM (Totally Integrated Power Module) Failure and 4xe Engine Sand-Casting Contamination — Loss of Propulsion / Engine Fire (Recall 25V-766 / 78C) and Manual transmission clutch pressure plate overheating / fire risk (recall 21V-028 & 23V-116) and Wrangler 4xe PHEV high-voltage battery fire risk (recall 23V-787, park outside) and TIPM (Totally Integrated Power Module) failure — fuel pump relay & random electrical faults and Death Wobble: violent front-end shaking at highway speed (solid front axle) and Insufficient Child-Seat Tether Anchor Welds on the Second-Row Right-Side Seat Frame (Recall 26V224 / 27D) and October 2025 Uconnect OTA Update Bricks Hybrid Control Processor — Sudden Loss of Drive Power (Recall 25V710 / A7C) and High-Voltage Battery Internal Failure — Fire While Parked or Driving (Recall 25V741 / 68C, Park Outside & Stop Charging) and Front-End 'Death Wobble' — Violent Steering Oscillation at Highway Speed After a Bump or Bridge Joint and Steel Wheel Walls Too Thin — Wheels Can Crack or Detach (Recall 26V456 / 05D) and Electric-Hydraulic Power Steering Pump Wiring Overheat — Fire Risk & Loss of Assist (2026 Recall) and 3.6L Pentastar V6 left cylinder head failure / engine tick (early build) and In-Tank Fuel Pump Module Failure — Whine, Hard Start & No-Start and Clock Spring Failure Causing Airbag Light, Horn, and Cruise Control Loss and Cruise Control May Not Disengage — Wiring Short Circuit (Recall 18V332000) and 3.6L Pentastar Rocker Arm / Lifter Needle-Bearing Failure — Valvetrain Tick, Misfire & Cam Damage and Front Frame Rust and Control Arm Bracket Corrosion and 4xe Repeated 12V Battery Drain / Complete Electrical Shutdown and Body Tub, Floor Pan & Body-Mount Rust (Torque Box Corrosion) and Steering Column Clockspring Failure — Airbag Warning Light, Dead Horn / Cruise / Wheel Controls and Steering Gear Box Loose Play & Highway Wandering (Aluminum-to-Steel Box TSB) and 4.0L Crankshaft Position Sensor Thermal Failure — Random Stalling & Hot No-Start and OPDA/Camshaft Synchronizer Failure Causing Squeal and Cam Gear Wear and 4.0L 0331 Cylinder Head Casting Cracking Between #3 and #4 Cylinders and Dana 35 Rear Axle Shaft C-Clip Failure ("Grenade") and eTorque Belt-Starter Generator (BSG) / 48V Power Pack Failure — Charging & No-Start and Instrument Panel Cluster Internal Short Circuit and Total Cluster Failure (Recall 24V652 / 30B) and Powertrain Control Module Voltage Regulator Chip Failure — Stall or No-Start (Recall 18V524000 / Chrysler U87) and Improperly Welded Steering Column Control Module May Prevent Driver Airbag Deployment (Recall 24V199). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
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When Issues Typically Appear
Fuel Filler Check Valve Failure Causing Gas Blowback During Refueling
20K-120K
OPDA/Camshaft Synchronizer Failure Causing Squeal and Cam Gear Wear
30K-100K
NSG370 6-Speed Manual First-Gear Pop-Out and Synchronizer Wear
30K-120K
Clock Spring Failure Causing Airbag Light, Horn, and Cruise Control Loss
40K-120K
Radiator End Tank Cracking and Coolant Leaks
60K-160K
Exhaust Manifold Cracking on 4.0L Inline-Six
60K-150K
Catalytic Converter Failure and Pre-Cat Efficiency Codes on 4.0L
70K-180K
Ignition Coil Rail Failure Causing Misfire on 4.0L
70K-170K
Blower Motor Resistor and HVAC Fan Speed Failure
70K-180K
Front Frame Rust and Control Arm Bracket Corrosion
80K-200K
050K100K150K200K mi
Community reported
1,450 owners
The TIPM can develop internal relay failures causing various electrical problems including fuel pump not activating, horn honking randomly, wipers activating on their own, and other erratic electrical behavior. This is a well-known issue across Chrysler vehicles.
TIPM replacement is the definitive fix but expensive. External bypass relays can be installed for specific failing circuits (fuel pump relay bypass is common). Used TIPMs available but may have similar issues. Some shops rebuild TIPMs.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
MAKS TIPM-7 fuel-pump relay bypass
OEMMAKS TIPM-7-FUEL-PUMP-RELAY-BYPASS
Bypass only a test-confirmed failed internal fuel-pump relay without replacing the complete TIPM Fitment/availability: 2007-2016 Wrangler JK with compatible TIPM-7 and a proven internal fuel-pump relay fault; verify fuse-box style and ve…
High Confidence1,450 owner reportsLast reported by owners Feb 2024Reviewed Feb 2026
NHTSA campaign 23V787000 covers certain 2021-2023 Jeep Wrangler plug-in hybrid vehicles whose high-voltage battery may fail internally and cause a fire while parked or driving. That campaign was replaced by 24V720000, which was then replaced by current campaign 25V741000. Vehicles previously repaired under the earlier campaigns may need the current remedy.
Common Symptoms
High-voltage battery fire while parked or driving
How to Fix
Check the VIN for current campaign 25V741000 (FCA recall 68C). Until the current remedy is completed, park outside and away from structures and other vehicles and do not charge the vehicle. Dealers update the high-voltage battery software and replace the battery as necessary, free of charge.
The TIPM is the integrated fuse/relay power-distribution module controlling most electrical systems. On many 2007-2018 Chrysler/Jeep vehicles, including the JK Wrangler, the internal fuel-pump relay (and later the other relays) degrades. The first symptom is usually a fuel-pump-relay problem causing hard starts, no-start, or stalling; failures can also present as random gremlins — fuel pump running with the key off, wipers or door locks cycling on their own, or intermittent electrical loads. While Chrysler recalled the 2011-2013 Grand Cherokee/Durango with an external relay, the Wrangler was generally not recalled, leaving owners to repair the module themselves. Dealer TIPM replacement runs ~$1,000-$1,200; repair/rebuild services and external-relay bypass kits are cheaper alternatives.
Hard start, no-start, or stalling (fuel pump not priming)
Fuel pump running with the ignition off
Random electrical behavior — wipers, door locks, or lights cycling on their own
Intermittent dead-vehicle conditions
How to Fix
Confirm the fuel-pump relay as the failure point (fuel pump not priming, no-start). Options: rebuild/repair the existing TIPM (specialist services), install an external fuel-pump relay bypass kit, or replace the TIPM (dealer ~$1,000-$1,200; module ~$400 plus programming). An external relay bypass is the common low-cost fix for the fuel-pump-relay failure mode.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
MAKS TIPM-7 fuel-pump-relay bypass
OEMMAKS TIPM-7-FUEL-PUMP-RELAY-BYPASS
Bypass a test-confirmed failed internal fuel-pump relay while retaining ASD safety behavior Fitment/availability: 2012-2018 Wrangler JK with TIPM-7; manufacturer lists all Wrangler variants through 2018.
An over-the-air Uconnect update pushed on Friday, October 10, 2025 caused an incomplete communication handshake between the Telematics Box Module (TBM) and the Hybrid Control Processor (HCP). The HCP resets, and the vehicle loses all motive power — gasoline and electric — with no warning. NHTSA received well over 100 complaints in the two weeks following the update, nearly all filed in October 2025. Owners describe driving normally for 2-10 minutes, then all dash lights flashing, a 'Shift into PARK to restart' message, complete loss of throttle, and in many cases loss of power steering and brake assist while rolling. Restarting restores operation for a few more minutes before it repeats. Several owners were stranded in traffic or on highways; some reported code P1E1D. Stellantis cancelled the update and pushed an automatic rollback the following evening, then filed a formal safety recall on October 17, 2025 covering 24,238 units of 2023-2025 Wrangler 4xe.
Common Symptoms
Complete loss of drive power while driving, gas and electric both dead
Dashboard warning lights all illuminate at once
'Shift into PARK to restart' / flashing gear indicator message
Loss of power steering and brake assist during the event
Vehicle runs 2-10 minutes after restart then fails again
Check engine light, stored code P1E1D
Reduced hybrid battery range after the update
How to Fix
Have the dealer complete Recall 25V710 (FCA code A7C) — a telematics box module software update, free of charge. If the vehicle is currently in the fault state, Stellantis' interim guidance was to park with the ignition on for at least 10 minutes in an area with cellular coverage so the rollback OTA can install, then key-cycle and check for stored faults. A vehicle that will not clear must be towed; do not attempt to drive it, because the failure removes propulsion, steering assist and brake assist simultaneously.
Chrysler recalled 320,068 vehicles — including all 2020-2025 Wrangler 4xe — because the high-voltage traction battery can fail internally and start a fire whether the vehicle is parked or being driven. This is a separate campaign from the 4xe engine sand-casting-contamination recall; here the defect is inside the HV pack itself. Owners were told to park outside away from structures and to stop charging entirely until remedied, and for months after the December 17, 2025 notification letters no final remedy existed. NHTSA complaints from 2025 Wrangler 4xe owners document the practical consequences: vehicles that cannot be garaged or charged, dealers refusing to open STAR cases, and at least one 2025 Wrangler that caught fire at the passenger front wheel area after a sudden loss of power on the interstate with a family aboard.
Common Symptoms
Vehicle fire originating at the high-voltage battery while parked or driving
Recall notice instructing owner to park outside and stop charging
Sudden loss of propulsion preceding smoke or fire
Hybrid system warnings before a thermal event
How to Fix
Until the recall is completed, follow Stellantis' instructions literally: park outdoors and away from buildings, and do not plug the vehicle in to charge. Have the dealer perform Recall 25V741 (FCA 68C) — high-voltage battery software update with HV battery replacement as necessary, free of charge. Ask the dealer to document the pack's State of Health reading from the diagnostic session; several owners report dealers declining to share it. If the dealer refuses to open a STAR case, escalate through Jeep Wave and file with NHTSA.
The 2018 Jeep Wrangler is included in FCA US recall 18V332000, which covers a defect that can prevent the cruise control system from shutting off. NHTSA's record states that if a short circuit occurs in the vehicle's wiring while cruise control is engaged, the driver may not be able to cancel it — neither by pressing the brake pedal nor by switching the system off manually. The Wrangler would then hold its set speed, or possibly accelerate, despite the driver's attempts to deactivate it. NHTSA's stated consequence is an increased risk of a crash. Because 2018 was the only Wrangler model year named in this campaign, owners of a JL or a final-year JK from that year should check their VIN rather than assume the truck is clear.
Common Symptoms
Cruise control does not cancel when the brake pedal is pressed
Cruise control cannot be switched off manually once engaged
Vehicle maintains its set speed despite attempts to deactivate cruise control
Vehicle may accelerate while cruise control is engaged
How to Fix
The repair is free at any Jeep dealer. The dealer inspects the software and performs a software flash on the engine or powertrain control module. Owner notification began June 4, 2018; FCA customer service is 1-800-853-1403. Enter your VIN at nhtsa.gov/recalls to confirm whether your Wrangler is covered and whether the flash was ever performed. Until the update is done, NHTSA advises not using cruise control at all. If cruise control ever will not disengage while driving, apply the brakes firmly and steadily, shift the transmission to neutral, and put the vehicle in park once it has stopped.
Wrangler 4xe owners report repeated dead 12V auxiliary batteries and, in some cases, complete electrical shutdowns. Several owners found the included Level 1 charger drains the 12V battery after the high-voltage pack reaches 100%, leaving the vehicle unresponsive within days. Beyond no-starts, some 4xe vehicles abruptly lose power or shut off while driving (often when EV range is exhausted), and owners have had to disconnect and reconnect the 12V battery to revive the vehicle, sometimes with persistent warning lights afterward. Dealers frequently cannot locate the parasitic drain even when the 12V battery tests good.
Common Symptoms
Dead 12V battery / no-start
Complete electrical shutdown
Vehicle loses power or stalls while driving
Battery drains after reaching full charge
Requires disconnecting/reconnecting 12V to restart
Persistent warning lights after restart
How to Fix
Apply all available 4xe software/PCU updates (some shutdown reports trace to OTA update regressions, and updates have also addressed charging-state drain). Test the 12V auxiliary battery and charging system; replace a weak 12V battery and verify proper terminal connections. As an interim measure many owners unplug the Level 1 charger once the pack reaches 100% to stop the drain. For drive-cycle shutdowns/loss of propulsion, have the dealer pull stored faults and check for related recalls/customer-satisfaction campaigns, as some 4xe loss-of-power conditions overlap with open safety actions.
The clockspring (a coiled ribbon-cable assembly behind the steering wheel that maintains electrical continuity to the driver airbag, horn, cruise control, and steering-wheel radio controls while the wheel turns) is a chronic Wrangler failure point, aggravated by off-road dust intrusion and vibration. Dust contamination of the flexible conductor's grease causes it to bend abnormally and the circuits to wear open — most critically the driver-airbag squib circuit, which may not deploy in a crash. NHTSA recall 16V-288 (Safety Recall S40) covered 2011-2016 RIGHT-hand-drive Wranglers; a companion recall covered earlier RHD units, and NHTSA investigated 2007-2012 left-hand-drive Wranglers. For 2011-2016 LEFT-hand-drive Wranglers, FCA did NOT recall but issued Customer Satisfaction Notification X68 (bulletin D-17-01) extending the clockspring warranty to 15 years/unlimited miles due to the failure rate. The airbag circuit can fail while horn/cruise still work, or vice versa.
Common Symptoms
Airbag / SRS warning light illuminated
Horn inoperative
Cruise control inoperative
Steering-wheel radio/audio buttons not working
Radio presets changing randomly
Intermittent operation that worsens after off-road/dusty use
How to Fix
Scan for airbag (SRS) fault codes and inspect the clockspring for dust intrusion and open circuits. Accepted fix is replacement of the steering-column clockspring assembly (recall/warranty repairs also replace the steering-wheel back cover and column shrouds). On recall- or X68-warranty-eligible VINs the dealer performs this free (and reimburses prior paid repairs); otherwise it is a standard clockspring R&R. Keeping the steering-column boot/seals intact helps prevent recurrence on heavily off-roaded Jeeps.
eTorque (mild-hybrid) Wranglers replace the conventional alternator/starter with a 48V belt-driven motor-generator (BSG/MGU) plus a 48V power pack unit (PPU) and a 12V system. Owners report charging-system failures, battery warning lights, rough/failed auto-starts during stop-start cycling, voltage drops, stalling, and no-starts. The most common culprit is the 48V PPU rather than the MGU itself, though both fail. The MGU/BSG (Mopar 68452771AF) is expensive and, once replaced, must be programmed with the dealer scan tool or it will not function. Components fall under the 8-year/80k-mile hybrid warranty, but out-of-warranty repairs are costly.
Rough or failed engine restart in stop-start traffic
Voltage drops, stalling, or no-start
Service charging system / hybrid warning messages
Dead 12V battery despite a recent replacement
How to Fix
Diagnose the 48V/12V charging system with the dealer scan tool to distinguish a failed 48V PPU (the most frequent cause) from a failed belt-starter generator (MGU). Replace the PPU or the MGU (Mopar 68452771AF) as indicated; a new MGU MUST be programmed/initialized with the factory tool before it will operate. Inspect the dedicated BSG belt/tensioner (PN 05281667AC) and 12V battery health, since a weak 12V battery can mimic charging faults. Use the hybrid warranty where eligible.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 68381513AA 48V Power Pack Unit battery kit
OEMMopar 68381513AA
Replace a professionally diagnosed failed 48V PPU after warranty and VIN checks Fitment/availability: Cataloged 2018-2024 Wrangler eTorque applications; VIN confirmation required.
Replace a factory-scan-confirmed failed early 2.0L eTorque generator Fitment/availability: 2019-2020 Wrangler JL with 2.0L eTorque as explicitly cataloged; not a later non-eTorque 2.0L and not the 3.6L MGU. Requires factory initializatio…
Replace a cracked, contaminated or out-of-spec BSG drive belt on the compatible 2.0L branch Fitment/availability: 2019 Wrangler JL 2.0L eTorque catalog page; broader early-JL use must be confirmed by VIN.
Genuine Mopar 05281667AD lower BSG belt tensioner
OEMMopar 05281667AD
Replace a confirmed failed lower BSG tensioner on the compatible 2.0L branch Fitment/availability: 2018-2026 Wrangler JL 2.0L with Belt-Start Generator per retailer; verify VIN and actual eTorque configuration.
Genuine Mopar 5281592AA 3.6L eTorque MGU drive belt
OEMMopar 5281592AA
Replace a cracked, contaminated or out-of-spec MGU drive belt on the compatible 3.6L branch Fitment/availability: 2019-2023 Wrangler JL 3.6L ERG eTorque according to the live listing; confirm VIN/build because the issue's broad 2018-2024…
Chrysler recalled 32,863 vehicles — 2018-2024 Wrangler and 2020-2024 Gladiator — because the instrument panel cluster can develop an internal short circuit and fail outright, taking the speedometer, fuel gauge, and every telltale and warning lamp with it. NHTSA classified this as a failure to comply with FMVSS 101, 'Controls and Displays.' Unlike a software-blanking fault this is a hardware defect inside the cluster, and the declared remedy is replacement, not a reflash. Owner notification letters went out between October 3, 2024 and January 23, 2025.
Speedometer, tachometer and fuel gauge inoperative
All warning lamps and telltales lost
Intermittent cluster flicker before total failure
How to Fix
Have the dealer perform Recall 24V652 (FCA 30B) — full instrument panel cluster replacement, free of charge. There is no software fix; a dealer offering only a reflash has not performed the campaign. Verify eligibility by VIN at NHTSA.gov before scheduling, and if the cluster has already been replaced at owner expense, submit the receipt to Chrysler customer service (1-800-853-1403) for reimbursement under the recall.
Wrangler models built for the 2017 and 2018 model years are included in FCA US safety recall 18V524000 (Chrysler campaign number U87). The powertrain control module in these Jeeps may contain a circuit-board voltage regulator chip that can fail. When that chip fails, the Wrangler can stall while being driven or refuse to start at all. NHTSA classifies the defect under electrical system wiring, front underhood, and warns that a vehicle stall increases the risk of a crash. The campaign spans a large slice of the FCA lineup for those years, but each affected vehicle is covered individually by VIN.
Common Symptoms
Engine stalls while driving
Vehicle will not start
How to Fix
The repair is free at any Jeep dealer: the dealer replaces the powertrain control module. Chrysler began mailing owner notifications on October 2, 2018, so a used Wrangler may have changed hands without the letter reaching the current owner. Enter your VIN at nhtsa.gov/recalls to confirm whether campaign U87 is still open on your truck, then book the PCM replacement. Chrysler customer service can be reached at 1-800-853-1403.
The 8.4-inch Uconnect touchscreen suffers physical delamination: the optically-clear adhesive (OCA) bonding the glass digitizer to the display breaks down under repeated dashboard heat cycling. This produces bubbles and cloudy patches, then 'ghost touches' where the screen registers phantom presses (jumping menus, dialing on its own, changing climate), and in severe cases the liquefied adhesive drips onto the center console. This is mechanically distinct from the already-documented Uconnect freeze/reboot software faults. Coverage tightened in December 2024 to a strict 60,000-mile cutoff, leaving many owners paying out of pocket.
Common Symptoms
Bubbles or cloudy blotches under the touchscreen glass
Ghost/phantom touches — screen activates inputs by itself
Menus jump or buttons press without being touched
Adhesive/goo seeping from screen edges onto the console
Worsens in hot weather / after sitting in the sun
How to Fix
Early on, request a Mopar/Jeep Cares goodwill radio replacement if within the 60k-mile/coverage window. The durable fix is to replace or rebuild the touchscreen/digitizer assembly. Many owners use specialist refurb services that remove the failed OCA between the digitizer and LCD and re-bond it (or convert to perimeter tape), at far lower cost than a dealer head-unit swap. Park in shade / use a sunshade to slow heat-driven recurrence.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Cuescreens gel-free Uconnect 4/4C 8.4-inch LCD and touchscreen assembly
OEMCuescreens UAQ/UAS upgraded LA084X01 assembly
Replace a physically delaminated compatible LCD/digitizer assembly instead of the complete radio Fitment/availability: 2018-2021 Wrangler JL with Uconnect 4/4C 8.4-inch UAQ or UAS radio using the single-ribbon LA084X01 screen family; con…
Early JK Wranglers commonly develop instrument-cluster faults: speedometer, tach, fuel, and temp needles that stick, read erratically, or drop to zero, and in some cases full cluster/CCN module failure. Owners report needles losing their retaining adhesive on the stepper-motor shafts. A high-demand JK electrical search.
Common Symptoms
Speedometer or tach needle sticks / reads wrong
Fuel and temp gauges inaccurate
Needles drop to zero intermittently
Dead or flickering cluster
Warning lights on with no fault
How to Fix
For sticking/erratic needles, the cluster is removed and the stepper motors/needles reseated or the board repaired; specialists (e.g. UpFix) offer a rebuild-and-return service. Complete failures require a replacement cluster (must be programmed/mileage-matched to the VIN via a dealer or locksmith tool). Reseat any needle fully onto its driver shaft.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
US Speedo 2007-2018 Wrangler JK instrument-cluster repair service
OEMUS Speedo REP0718wrajk
Repair and return the original cluster after vehicle-side diagnosis confirms an internal cluster fault Fitment/availability: 2007-2010 Wrangler JK within this issue; service page covers 2007-2018 JK. Confirm covered symptoms, turnaround,…
The 8.4-inch Uconnect 4 and the newer Uconnect 5 head units frequently freeze, glitch, reboot multiple times before booting, or go to a black screen. A common and safety-relevant failure mode is the rear backup camera failing to display when shifted into Reverse, showing a blue/black screen, or staying on after moving forward. The system is sensitive to 12V voltage drops (a weak auxiliary/aux battery makes it lag, reset, or refuse to boot), and many JLs ship with loose fuses that aggravate the problem. Stellantis acknowledged a broad list of Uconnect 5 failures across 2021-2024 vehicles in Technical Service Bulletin 08-008-24.
Reboot the head unit (hold volume + tuner knobs ~10-20 seconds) and reseat fuse F97 to clear a frozen state. Apply the latest Uconnect software update per TSB 08-008-24, which addresses many freeze/reboot and camera bugs. Check and tighten loose cabin fuses and verify the auxiliary/12V battery health, since low voltage triggers resets. If the backup camera still blanks, inspect the camera, its harness, and connector; replace the camera or radio module if a hardware fault is confirmed.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Replace a circuit-tested failed rear camera after software, power, connector and harness faults are excluded Fitment/availability: 2018-2024 Wrangler JL applications cataloged without the alternate 35-inch-tire or off-road-camera configu…
The automatic engine start-stop system can be problematic, with complaints about delayed restarts, aggressive shutoffs, and system deactivating in conditions where owners expect it to work. The system defaults to ON each time the vehicle starts.
Common Symptoms
Delayed engine restart
System shuts off at inappropriate times
ESS not available message
Engine shuts off then immediately restarts
System won't disable
How to Fix
System can be disabled with button press each drive. Aftermarket ESS disable devices available that remember your preference. Ensure battery is in good condition - weak batteries cause issues. Some owners have had battery replaced to improve ESS function.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
TRL Automotive Autostop Eliminator for Wrangler JL
OEMTRL Wrangler JL Autostop Eliminator
Optional reversible device that remembers the driver's ESS-button preference on a healthy system Fitment/availability: 2018-2026 Wrangler JL with non-hybrid gasoline or diesel engine and factory ESS button; explicitly not for 4xe.
High Confidence780 owner reportsLast reported by owners Feb 2024Reviewed Feb 2026
TJ Wranglers commonly lose one or more cabin fan speeds because the blower motor resistor overheats or the connector melts. Owners usually notice the fan only works on high speed, or stops working on lower settings first. The issue is well documented in owner forums and service parts databases, especially on vehicles with aging blower motors that draw excess current.
Common Symptoms
HVAC fan works only on high
One or more blower speeds inoperative
Burnt electrical smell from dash
Melted resistor connector
Intermittent cabin fan operation
How to Fix
Diagnosis is straightforward: verify which fan speeds work, inspect the resistor pack and harness for heat damage, and measure blower motor current draw. Replacing only the resistor may be temporary if the blower motor is dragging, so many repairs include both the resistor and pigtail connector. Cleaning cowl drains and checking for moisture intrusion can also help prevent repeat failures.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown 4864957 blower-motor resistor
OEMCrown 4864957
Restore missing lower fan speeds after circuit testing confirms the early/RHD resistor is open Fitment/availability: 2000-2001 Wrangler TJ LHD or RHD, plus 2002-2006 TJ RHD.
Restore missing lower fan speeds after circuit testing confirms the redesigned LHD resistor is open Fitment/availability: 2002-2006 Wrangler TJ/Unlimited LHD branch; verify steering position and connector.
Connector/harness repair when inspection finds heat damage, loosened terminals or melted plastic Fitment/availability: 1997-2006 Wrangler TJ/LJ application; use only when the connector is damaged and splice with the specified sealed meth…
Because Wranglers are routinely driven topless/doorless and through water, the driver's master power-window switch is prone to water damage and carbon buildup at its contacts, while the window regulators (plastic guides/clips) wear and break. The result is windows that stop working — sometimes all at once (master switch), sometimes a single window where the motor whirs but the glass doesn't move (broken regulator). Reported quirks include windows refusing to go down until an ignition cycle, or switches operating the wrong window. It is a frequently searched, low-cost JK fix.
Common Symptoms
All power windows stop working at once
Single window: motor runs/grinds but glass doesn't move
Windows won't operate until the ignition is cycled
Switch operates the wrong window or works intermittently
Corrosion/water visible in the switch cluster
How to Fix
If all windows die together, suspect the driver's master switch — pop the switch panel with a trim tool, inspect for corrosion/water, clean contacts with electrical cleaner, or replace the master switch (Mopar 68290764AE for 2018+; earlier JK SwitchDoctor/Mopar equivalents). If you hear the motor run or grind but the glass doesn't move, replace the window regulator. Address the underlying water intrusion (seal/route) to prevent recurrence.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Replace the confirmed failed early JK dash-mounted master switch Fitment/availability: 2007-2010 Wrangler JK with power windows; confirm connector, button layout and VIN before ordering.
Replace the confirmed failed later JK four-door master switch Fitment/availability: 2011-2018 Wrangler JK Unlimited four-door with power windows; distinguish 2018 JK from JL and verify VIN/button layout.
Replace the confirmed failed later JK two-door master switch Fitment/availability: 2011-2018 Wrangler JK two-door with power windows; distinguish 2018 JK from JL and verify VIN/button layout.
Replace a mechanically failed driver/front-left power-window regulator after electrical testing Fitment/availability: 2007-2018 Wrangler JK with power windows, front left/driver side; distinguish 2018 JK from JL. Regulator only—test the …
Clean accessible switch and connector contacts after disconnecting power and confirming corrosion is repairable Fitment/availability: Universal plastic-safe, no-residue electronic contact cleaner.
NHTSA campaign 25V766000 covers certain 2024-2025 Jeep Wrangler 4xe plug-in hybrid vehicles. Casting-sand debris inside the engine can contaminate internal components and cause catastrophic engine failure, an unexpected loss of drive power, or an engine-compartment fire. Owners may notice engine knocking or a malfunction indicator lamp before failure.
Common Symptoms
Engine knocking
Malfunction indicator lamp
Unexpected loss of drive power
Engine-compartment fire
How to Fix
Check the VIN for campaign 25V766000 (FCA recall 78C). Dealers install a software update and replace the engine block or engine as necessary, free of charge. Stop driving and contact a dealer if knocking, a malfunction indicator lamp, loss of propulsion, smoke, or fire occurs.
Early 3.6L Pentastar V6 Wranglers (especially 2012 and early-2013 builds) suffered a left (driver-side) cylinder head defect where the head would overheat and damage a valve seat/guide, causing low compression, a persistent ticking/tapping noise (often described as a 'left bank tick'), misfires, rough idle and reduced power. FCA acknowledged the defect and issued extended-warranty coverage (campaign X56) extending the head/related coverage to 10 years / 150,000 miles. A separate, related Pentastar tick on later builds is caused by failed rocker-arm needle bearings or collapsed valve lifters rather than the head casting. A class action was filed over the 3.6L tick. Left unaddressed, valvetrain wear can progress to major top-end engine damage.
Ticking or tapping noise from the left (driver) cylinder head, often loudest when warm
Misfire, rough idle, reduced power
Check engine light with misfire codes
Low compression on the affected bank in early-build head failures
How to Fix
Diagnose tick source: scan for misfire DTCs (commonly P0300/cylinder-specific P0301-P0306) and check compression on the affected bank. Early-build head failures are repaired by replacing the affected cylinder head (covered under X56 extended warranty if eligible). Tick caused by rocker arms/lifters is repaired by removing intake and valve covers and replacing the failed rocker arm(s)/lifter(s). Keep oil changes on schedule with correct-spec oil to limit cold-start valvetrain wear.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 68141353AC complete left cylinder head with valves
Conditional valvetrain repair when inspection confirms a collapsed or worn lash adjuster instead of an X56 left-head failure Fitment/availability: Specified Wrangler/Pentastar applications, sold individually. Confirm VIN and quantity; in…
The 3.6L Pentastar V6 used in JK (2012-2018) and JL (2018+) Wranglers suffers a documented valvetrain failure separate from the engine's oil-consumption problem. The needle roller bearings inside the rocker arms wear prematurely, loosen, and can drop out, shifting the rocker arm out of alignment so its roller stops turning and grinds against the camshaft lobe. This scrapes both parts and circulates metal debris through the oil. It typically begins as a persistent top-end 'Pentastar tick' (loudest at cold start, then constant) and progresses to random or cylinder-specific misfires, rough idle, bucking/surging, hesitation, power loss, and — if ignored — catastrophic cam/valvetrain damage. A proposed class-action lawsuit against FCA covering 2014-2020 3.6L Chrysler/Dodge/Jeep/RAM vehicles alleges a defective needle-bearing rocker design. Commonly surfaces after roughly 60,000-100,000 miles.
Persistent top-end ticking noise (Pentastar tick), loudest at cold start
Check engine light with random or cylinder-specific misfires
Rough idle, bucking/surging, hesitation
Reduced power/performance
Metal shavings found in engine oil
How to Fix
Diagnose with a cold-start listen plus cylinder-specific misfire and cam/crank correlation codes. Accepted repair is replacement of the affected rocker arms and hydraulic lash-adjuster lifters; if the camshaft lobe is scored, the camshaft(s) must also be replaced, along with a thorough oil-system flush to purge metal debris. Many shops replace all rockers as a set to avoid repeat failure. Catching it at the tick stage (before misfire/cam damage) is dramatically cheaper than after debris circulates.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 5184296AH roller rocker arm
OEMMopar 5184296AH
Individual rocker replacement after cover-off inspection confirms rough, loose, seized or displaced roller hardware Fitment/availability: Cataloged 3.6L Pentastar rocker branch used by specified Wrangler applications; sold individually, …
Individual hydraulic lash-adjuster replacement when inspection/test confirms collapse, sticking or wear Fitment/availability: Specified Pentastar valvetrain applications including Wrangler; sold individually and not proof that a rocker, …
The crankshaft position sensor (CPS) on the 4.0L (and 2.5L) inline engines mounts on the transmission bellhousing and is exposed to severe heat soak. As it ages it develops intermittent thermal failure: the engine stalls without warning once hot, then refuses to restart until it cools, after which it runs fine again — a maddening, hard-to-replicate fault. Frequently the CPS fails with NO check-engine light and NO stored code, so it is commonly misdiagnosed. It is a top-searched TJ/early-Wrangler stalling complaint and a roadside-safety concern because the stall is sudden.
Common Symptoms
Engine stalls suddenly while driving, especially when hot
Will not restart until the engine cools, then runs normally
Cranks but no start when hot
Often no check-engine light and no stored DTC
Intermittent stumble/backfire
Hard starting in rainy/humid weather
How to Fix
When the engine stalls hot and won't restart, unplugging and reconnecting the CPS connector (near the back of the intake) often resets the PCM and the engine fires — a strong indicator the CPS is failing. Replace the crankshaft position sensor with a Mopar or NTK/NGK unit (Mopar 56027866AE for many 4.0L applications; 4727451AA covers 2003-2011 TJ/JK 3.8L & 4.0L). Avoid bargain aftermarket sensors — out-of-tolerance units cause repeat no-starts. No relearn required; verify with a hot road test.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown 56027865AB crankshaft-position sensor
OEMCrown 56027865AB
Manual-transmission/early-engine sensor replacement after hot testing confirms signal dropout Fitment/availability: 1997-2004 Wrangler TJ 4.0L manual-transmission branch; the underlying application family also covers specified 1997-2002 …
Early automatic-transmission sensor replacement after hot testing confirms signal dropout Fitment/availability: 1997-2002 Wrangler TJ 4.0L automatic-transmission branch. Confirm connector and transmission; not the manual or 2003-2006 bra…
Standard Motor Products PC243 crankshaft-position sensor
OEMStandard PC243 / Mopar cross 4727451AA
Later TJ 4.0L sensor replacement after hot testing confirms crank-signal dropout Fitment/availability: Crosses Mopar 4727451AA for specified 2003-2006 Wrangler TJ 4.0L applications; verify transmission/connector and exact catalog fit bef…
Late-TJ 4.0L Wranglers are well known for Oil Pump Drive Assembly (OPDA) failures, often described by owners as the 'screaming monkey' chirp or squeal from the engine bay. The OPDA can bind or wear internally, which may damage the camshaft gear and affect oil pump drive timing. If ignored, the issue can escalate from noise and check-engine lights to expensive internal engine repair.
Diagnosis involves listening for chirping near the OPDA, checking shaft play, inspecting the drive gear wear pattern, and verifying cam/crank sync if a fault code is present. The usual repair is replacing the OPDA with an updated unit and inspecting the cam gear for abnormal wear before reinstalling. Many owners also lubricate the replacement gear and monitor for recurring noise after installation.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown Automotive 53010624AC updated OPDA assembly
OEMCrown 53010624AC
Replace a confirmed noisy, binding or worn OPDA with the revised-lubrication assembly Fitment/availability: 2005-2006 Wrangler TJ/Unlimited 4.0L; inspect the mating cam gear and index the engine before removal.
Replace the OPDA-mounted sensor only when circuit and sensor testing confirms failure Fitment/availability: 2005-2006 Wrangler TJ/Unlimited 4.0L; conditional sensor path.
The 4.0L inline-six heads carrying casting number 0331 (used on roughly 1999-2002 builds) were designed with enlarged intake/exhaust ports but left the deck wall between cylinders #3 and #4 too thin. Over high-mileage thermal cycling the head cracks in that area (visible through the oil-filler cap between the #3/#4 valve springs), often letting coolant weep into the combustion/oil galleries. It is one of the single most-searched TJ/LJ 4.0 failures.
Confirm the casting number and inspect the deck between #3 and #4 through the oil filler. A cracked 0331 must be replaced. Chrysler revised the casting in 2003 with a thicker deck stamped 'TUPY' on the intake side; owners replace with a TUPY head or an aftermarket thick-deck 0331 casting (Clearwater/Titan/Clegg reman) plus a new head gasket (Fel-Pro 26224PT) and ARP or Mopar head bolts. Verify the correct casting before buying, as a plain 0331 replacement can crack again.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
HDPC new reinforced complete Jeep 4.0L cylinder head for 0331/0630/7120 replacement
OEMHDPC reinforced universal Jeep 4.0L head
Crack-resistant replacement head after the original 0331 casting is confirmed cracked Fitment/availability: Published 1991-2007 Jeep 4.0L universal reinforced casting with thickened deck/water jackets; enter year/make/casting and confirm…
The 3.6L Pentastar V6 can consume oil at a rate higher than expected, sometimes requiring oil top-ups between changes. This is often related to piston ring design or valve guide seals. Chrysler considers up to 1 quart per 2,000 miles as within normal range.
Common Symptoms
Oil level drops between changes
Need to add oil frequently
Blue smoke from exhaust
Low oil pressure warning
Oil smell from exhaust
How to Fix
Monitor oil level frequently. Use manufacturer-recommended oil viscosity. If consumption is excessive, dealer may perform oil consumption test for warranty coverage. Some engines have had piston/ring replacement under warranty.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 68083202AC PCV valve
OEMMopar 68083202AC
Replace a confirmed faulty or restricted PCV valve after the consumption and leak checks Fitment/availability: 2012-2018 Wrangler JK 3.6L; verify VIN.
Genuine Mopar 68078776AA complete standard-size engine ring package
OEMMopar 68078776AA
Replace confirmed worn or defective standard-size rings during a measured professional rebuild Fitment/availability: 2012-2018 Wrangler JK 3.6L only after teardown measurements confirm standard-size rings and reusable bores/pistons; veri…
High Confidence920 owner reportsLast reported by owners Feb 2024Reviewed Feb 2026
The 3.6L Pentastar's combined oil cooler and oil filter housing adapter sits in the engine valley and is made of plastic that hardens, warps, and cracks under sustained underhood heat — it can also crack from over-tightening the oil filter cap. The resulting oil (and sometimes coolant) leak runs down the back of the block over the bellhousing, perfectly mimicking a rear main seal leak and leading to misdiagnosis. It is one of the most common 3.6 oil leaks across Wrangler, Gladiator, and other Pentastar applications, with no official recall. The OEM Mopar replacement is part 68105583; the popular upgraded all-aluminum fix is Dorman 926-959 (cooler/cap/filter kit) or 926-876 (housing + seals only).
Common Symptoms
Oil leak / drips appearing at rear of engine
Oil pooling in engine valley
Burning oil smell after drives
Low oil level between changes
Coolant mixing/seepage at housing
How to Fix
Confirm the source by cleaning the valley and watching for fresh oil at the housing seams (a dry flywheel/dust cover rules out the rear main seal). Replace the failed housing/cooler. The strongest fix is the upgraded all-aluminum Dorman housing-and-cooler kit (926-959, includes cooler, cap, and filter; 926-876 is housing+seals only) which eliminates the plastic-cracking failure mode; the OEM Mopar replacement (68105583) is also available. When servicing, only snug the oil filter cap (about 1/8 turn past contact) to avoid cracking the housing.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
TJ Wranglers with the 4.0L frequently develop catalytic converter deterioration, especially on higher-mileage vehicles and 2000-2006 emissions configurations using multiple converters/pre-cats. Owners commonly report a check-engine light with catalyst-efficiency codes, sulfur smell, rattling substrate, or loss of power if the converter begins to clog. This issue is well documented in owner complaints, repair databases, and Jeep service information.
Common Symptoms
Check engine light
P0420 or catalyst efficiency codes
Rattling from catalytic converter
Sulfur or rotten egg smell
Reduced power at higher RPM
Failed emissions inspection
How to Fix
Diagnosis involves checking for P0420/P0432-type efficiency codes, verifying upstream engine tune issues are not causing converter damage, and measuring exhaust backpressure or temperature differential if restriction is suspected. Repair is replacement of the failed converter assembly and any lazy O2 sensors if needed. Misfires, oil burning, or rich-running conditions should be corrected first so the new converter is not quickly damaged.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
The 4.0L coil-rail ignition system used on TJ Wranglers is known to develop internal failures that cause intermittent or persistent misfires. Owners report rough idle, hesitation, flashing check-engine lights, and cylinder-specific misfire codes, often after moisture intrusion, age, or heat exposure. Because the rail serves all cylinders, diagnosis can be less straightforward than on engines with individual plug wires.
Scan for misfire codes, inspect spark plugs, and verify injector and compression health before condemning the coil rail. If the rail is weak or cracked, replacement of the coil rail assembly and spark plugs is the typical fix. Dielectric grease on the boots and ensuring the valve cover area stays dry can help longevity.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 56041476AB ignition coil rail
OEMMopar 56041476AB
Replace a test-confirmed weak, cracked or internally failed coil rail Fitment/availability: 2000-2006 Wrangler TJ/LJ with 4.0L inline-six; not 2.4L/2.5L distributor or individual-coil systems. Confirm wiring and paired-cylinder evidence …
Replace worn or fouled correct-spec plugs as a set of six after confirming the vehicle's emission-label specification Fitment/availability: 0.035-inch copper plug commonly specified for the 4.0L waste-spark application; quantity six requ…
P0011 tells you the Bank 1 intake camshaft is stuck (or lagging) in the over-advanced position — the PCM commanded a phaser position it can't achieve. This code applies to the 3.6L Pentastar V6 (2012+ JK/JL), which uses dual VVT with a cam phaser on each of the four camshafts controlled by an Oil Control Valve (OCV / VVT solenoid) that meters engine oil to the phaser. NOTE: the earlier 3.8L OHV pushrod V6 (2007-2011 JK) has no VVT, no cam phasers and no OCV, so it cannot set P0011 — this code is Pentastar-only. The dominant real-world cause is oil-related: overdue/dirty oil or the wrong viscosity sludges the fine OCV passages and screen, so the solenoid responds sluggishly and the phaser hangs advanced. A failed OCV solenoid itself, or in higher-mileage cases a worn cam phaser, are the other causes. Pentastar engines are especially sensitive to oil condition here.
Common Symptoms
Check engine light on
Rough or unstable idle
Hesitation / poor throttle response
Occasional stalling
Hard start when hot
Reduced fuel economy
Engine ticking or rattle on cold start (worn phaser)
How to Fix
First check oil level and condition — if it's dark, sludgy, or the wrong grade, do an oil-and-filter change with the correct spec (5W-20/5W-30 per year) and re-test, as a fresh change clears many cases. If the code persists, inspect and clean or replace the Bank 1 intake Oil Control Valve / VVT solenoid and its screen. Verify wiring and connector integrity. Persistent codes after a good OCV point to a worn camshaft phaser, which is the more expensive fix.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 5184150AF oil-control valve
OEMMopar 5184150AF
Replace the confirmed faulty Bank 1 intake OCV on the first-generation Wrangler Pentastar Fitment/availability: 2012-2018 Wrangler JK 3.6L; distinguish 2018 JK from JL by VIN/body. Verify exact bank/position and connector before ordering.
Replace the confirmed faulty Bank 1 intake OCV on the upgraded JL Pentastar Fitment/availability: 2018-2021 Wrangler JL 3.6L intake position only; distinguish 2018 JL from JK. Do not substitute the different JL exhaust OCV.
The 3.8L V6 (used in 2007-2011 JK Wranglers) is widely reported to consume oil, with affected examples burning roughly a quart every 1,000-2,000 miles while others see little loss. Owners and forum techs attribute it to the low-tension piston rings combined with the U.S. 5W-20 oil specification (Jeep specs heavier 5W-30 in export markets), which lets thin oil slip past the rings and burn. In severe cases low oil from unnoticed consumption contributes to ticking, spun main bearings, or ring failure, so monitoring level between changes is important.
Monitor oil level frequently and keep it topped up. Many owners reduce consumption by switching from 5W-20 to 5W-30 (the grade Jeep specifies for this engine in export markets). Verify there are no external leaks (valve covers, oil pan gasket, intake) before blaming rings, and check the PCV system. Persistent heavy consumption with blue smoke indicates worn rings/valve seals requiring internal engine work or a remanufactured long block.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 4648973AD PCV valve
OEMMopar 4648973AD
Crankcase-ventilation repair when inspection confirms the 3.8L PCV valve is restricted, stuck or passing excessive oil Fitment/availability: 2007-2011 Wrangler JK 3.8L branch, superseding 4648973AB/AC.
The 4.0 routes oil through a cast oil-filter adapter housing bolted to the block behind the filter, sealed by a set of rubber O-rings. The O-rings harden and shrink with age/heat, producing a persistent oil leak on the passenger side of the block that runs down the bellhousing and is very commonly misdiagnosed as a rear main seal. A classic high-mileage TJ/XJ/ZJ oil leak.
Common Symptoms
Oil leak on passenger side of the block
Oil dripping from bellhousing area
Oily grime around the oil filter
Low oil level between changes
How to Fix
Replace the adapter O-ring set — Mopar/Crown kit 4720363 (three O-rings) for 93-01 4.0 applications. The housing is retained by a large T60 Torx through-bolt; back it out from underneath with the filter left on the housing so it can't spin on the roll pin. Some owners eliminate the adapter and run a narrow spin-on (Fram PH3614-style) filter directly on the block. Clean both mating faces before reassembly.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 4720363 oil-filter adapter O-ring seal set
OEMMopar 4720363
Complete adapter reseal after leak tracing proves oil originates at the adapter-to-block or through-bolt seals Fitment/availability: Seller's exact 1993-2001 Jeep Wrangler/Grand Cherokee 4.0L listing with 2001 Wrangler fitment shown. Mat…
A leaking rear main seal is nearly universal on high-mileage 4.0 Wranglers — the two-piece crankshaft seal hardens and weeps oil at the back of the block, dripping onto the bellhousing and often collecting at the transmission. It is one of the most-searched 4.0 oil leaks and is frequently confused with an oil-filter-adapter or oil-pan-gasket leak.
Common Symptoms
Oil drip at back of engine / bellhousing
Oil spots under the transmission bell area
Low oil level between changes
Oily film on skid plate
How to Fix
Because the 4.0 uses a two-piece rope/lip seal, the rear main can be replaced without pulling the transmission — drop the exhaust, oil pan, and main bearing support/cap to swap the upper and lower halves (Fel-Pro BS40183). Refresh the oil pan gasket (Fel-Pro OS34308R) at the same time. Correct RTV at the seal parting lines is critical to avoid a repeat leak.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Fel-Pro BS40612 two-piece rear-main seal set
OEMFel-Pro BS40612
Pre-redesign rear-main seal replacement after leak tracing confirms the crank seal Fitment/availability: 1994-1999 Wrangler 4.0L branch. Do not use on the 2000-2006 redesigned rear-main cap/seal application.
Post-redesign rear-main seal replacement after leak tracing confirms the crank seal Fitment/availability: 2000-2006 Wrangler/TJ 4.0L application. Do not use on the 1994-1999 pre-redesign branch.
Fel-Pro OS34308R one-piece molded oil-pan gasket set
OEMFel-Pro OS34308R / AutoZone 74438
Oil-pan reseal required when the pan is removed for the confirmed rear-main repair Fitment/availability: Application-specific Jeep 4.0L pan-gasket family spanning the issue years; confirm exact YMM before purchase.
JK Wranglers use a drive-by-wire electronic throttle. A fault in the electronic throttle body, the integrated throttle position sensor (TPS), the accelerator pedal position (APP) sensor, or their wiring/connectors triggers the red lightning-bolt warning, often together with the traction-control light. The PCM drops the engine into limp mode — reduced power, rough/erratic idle, and capped RPM — to protect the engine. Heat-soak and intermittent connector contact at the throttle body are common triggers, so the fault frequently comes and goes. It is one of the most-searched JK driveability complaints.
Common Symptoms
Red lightning-bolt (electronic throttle control) light on dash
Traction control light on simultaneously
Vehicle enters limp mode with reduced power
Rough or erratic idle, surging or stalling
RPM capped / poor acceleration
Symptom comes and goes (often heat-related)
How to Fix
Pull codes; P2refers commonly point to the throttle actuator or pedal sensor circuits. Clean the throttle body and inspect/re-seat the throttle-body and pedal connectors (a loose connector alone can cause it; some owners add pipe insulation to shield the harness from heat). Perform the throttle-body/idle relearn (key-on relearn procedure) after cleaning or replacement. If the actuator or TPS is faulty, replace the electronic throttle body (Mopar 04861661AB, supersedes 04861661AA) and relearn. Replace the accelerator pedal sensor assembly if the pedal-side circuit is at fault.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 4861661AB electronic throttle body
OEMMopar 4861661AB
Replace a scan-confirmed integrated throttle actuator/TPS failure on the first JK model year Fitment/availability: 2007 Wrangler JK with 3.8L V6 only; not 2008-2011 despite sharing the 3.8L engine and not the 2012-2018 3.6L.
Replace a scan-confirmed integrated throttle actuator/TPS failure on the later 3.8L JK branch Fitment/availability: 2008-2011 Wrangler JK/Unlimited with 3.8L V6.
Crown 5184349AC electronic throttle body with integrated TPS
OEMCrown 5184349AC
Replace a scan-confirmed integrated throttle actuator/TPS failure on the Pentastar JK branch Fitment/availability: 2012-2018 Wrangler JK/Unlimited with 3.6L Pentastar V6; 2018 means JK, not JL.
A very common TJ Wrangler problem is cracking of the 4.0L exhaust manifold/header, especially around the collector and expansion joints. Repeated heat cycling and engine movement fatigue the factory manifold, leading to ticking noises on cold start, exhaust smell, and sometimes failed emissions tests. Owners frequently report the noise being mistaken for valvetrain tick until the crack worsens.
Common Symptoms
Ticking noise on cold start
Exhaust leak smell in engine bay
Noise decreases as engine warms up
Failed emissions inspection
Visible soot near manifold crack
How to Fix
Diagnosis is usually done with a cold-start listen test, smoke test, or visual inspection from underneath and around the manifold welds. The long-term fix is replacement with an updated manifold/header design that includes better flex sections and new hardware/gaskets. Shops often recommend replacing manifold bolts/studs at the same time because broken fasteners are common on removal.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Replace a confirmed crack in the front/left half of the two-piece manifold Fitment/availability: 2000-2006 Wrangler TJ/LJ with 4.0L I6; front section only. Confirm emissions/downpipe arrangement and do not substitute a 1997-1999 one-piec…
Replace a confirmed crack in the rear/right half of the two-piece manifold Fitment/availability: 2000-2006 Wrangler TJ/LJ with 4.0L I6; rear section only. Confirm emissions/downpipe arrangement and do not use the old 53010198 salvage lis…
Renew the shared head-to-intake/exhaust seal whenever the manifolds are removed Fitment/availability: Jeep 4.0L application including the 2000-2006 Wrangler issue range; verify vehicle fitment and inspect sealing surfaces before installa…
Replace seized, broken, stretched or missing manifold-to-head hardware during the confirmed repair Fitment/availability: 1997-2006 Wrangler/TJ application within Dorman's 1991-2006 Jeep coverage; 3/8-16 and 3/8-24 hardware. Inventory is …
One of the most common 4.0 oil leaks: the valve cover gasket hardens and seeps, typically worst at the rear of the head, leaving oil and grime down the back of the block and sometimes dripping onto the exhaust (burning-oil smell). Frequently mistaken for a more serious rear main or head-gasket leak.
Common Symptoms
Oil seepage down the back/side of the engine
Burning-oil smell after driving
Oil pooling in spark-plug tube area
Grime buildup on the head
How to Fix
Replace the valve cover gasket — Fel-Pro VS50458R (or VS50522T, which has integrated bolt eyelets). Reuse the metal spacer inserts, replace the rubber grommets, clean both mating surfaces, and do NOT over-torque the bolts. Later steel-cover TJ/LJ 4.0s use the eyelet-style gasket. A cheap DIY fix.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Fel-Pro VS50458R one-piece valve-cover gasket set with grommets
OEMFel-Pro VS50458R / AutoZone 579204
Valve-cover reseal after leak tracing and cover inspection confirm the perimeter gasket Fitment/availability: Later Jeep 4.0L molded-rubber cover family cross-referencing Mopar 53020758AA/AC; confirm exact Wrangler YMM/cover, particularl…
A frequently misdiagnosed Wrangler oil leak is the upper (structural) oil pan gasket. On both the 3.8L and 3.6L, oil seeps from the sides of the upper oil pan, runs down, and collects at the back of the block — looking exactly like a rear main seal failure. Owners (and shops) often quote an expensive RMS job requiring transmission removal when the real culprit is the far cheaper oil pan gasket. The 3.6 also develops a related front/top seep that adds to the confusion.
Common Symptoms
Oil drips at rear of engine / over bellhousing
Oil spots on driveway
Low oil level over time
Oil film on transmission case
No leak visible from valve covers
How to Fix
Before authorizing a rear main seal replacement, remove the bellhousing dust cover and inspect: a dry flywheel points to the oil pan gasket rather than the RMS. Replace the upper oil pan gasket (a DIY-friendly job versus pulling the transmission for the RMS), using RTV at the front/rear cover seams per the service procedure. Re-clean and re-inspect after a few drive cycles to confirm the leak is resolved and not the oil cooler housing.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Mopar 5241062AB oil-pan gasket package
OEMMopar 5241062AB (current service revision may be 5241062AC)
Reseal a confirmed 3.8L engine-oil-pan leak with the correct molded gasket package Fitment/availability: 2007-2011 Wrangler JK 3.8L V6 only; package includes the pan gasket and oil-pickup-tube seal.
Reseal the structural engine-oil-pan flange where the factory procedure specifies Mopar gray RTV Fitment/availability: 2012-2018 Wrangler JK 3.6L upper/lower engine-oil-pan service, and only later JL operations whose VIN-specific factory…
Wranglers (JK and JL) with a solid front axle are prone to 'death wobble' — a violent, self-reinforcing side-to-side oscillation of the front-end steering components and steering wheel, typically triggered by hitting a bump, expansion joint or pothole at speeds above ~45-55 mph. The solid axle cannot absorb impacts as well as independent suspension, and once worn or loose steering/suspension components (track bar, ball joints, tie rod ends, control arm bushings, steering damper, wheel bearings) are jarred out of equilibrium the front end shakes uncontrollably until the driver slows well down. NHTSA logged hundreds of complaints across JK and JL generations (450+ for JL alone, including 2019-2021 Rubicons). FCA repeatedly replaced the steering damper as a band-aid, often without curing the problem. A nationwide class action (Reynolds/Tucker v. FCA US, E.D. Mich.) settled in June 2023 covering ~1.1M 2018-2020 Wranglers / 2020 Gladiators, providing an extended warranty on the front steering damper and reimbursement for prior damper repairs.
Common Symptoms
Violent steering wheel and front-end shaking after hitting a bump at highway speed
Whole front end feels like it is about to fall apart
Shaking only stops after slowing well below the trigger speed
Often returns repeatedly even after a steering damper replacement
Worse on lifted Jeeps or with worn/loose track bar and ball joints
How to Fix
Diagnose and replace the actual worn component rather than just the damper: inspect the track bar (bar and both mounting points/bracket), front ball joints, tie rod ends, drag link, control arm bushings, and wheel bearings; re-torque or replace as needed and set front-end alignment. An upgraded/heavy-duty track bar and steering stabilizer help on lifted or high-mileage trucks. 2018-2020 owners should check eligibility for the class-action steering-damper extended warranty (up to 8 years/90,000 miles) and prior-repair reimbursement.
The solid-front-axle JL Wrangler continues to produce death-wobble reports on brand-new 2024 and 2025 trucks. NHTSA complaints describe the trigger consistently: crossing a bridge expansion joint, road seam or rough patch at roughly 45-75 mph, after which the steering wheel and front end oscillate side to side violently until the driver brakes below about 50 mph. One 2024 4-door Sport S owner reported two uncontrollable events within 40 miles of leaving the dealership; another reported four unsuccessful dealer repair attempts. A recurring secondary complaint is that dealers cannot reproduce the event and therefore decline warranty repair. Root causes on the JL are a worn or loose track bar and track-bar bracket, a weak steering damper, loose tie-rod hardware, worn control-arm bushings, or wheel/tire imbalance — any of which lets the axle's natural caster-induced oscillation self-amplify.
Violent side-to-side steering oscillation starting after a bump or bridge joint
Wobble begins between roughly 45 and 75 mph and only stops when slowing below 50
Steering wheel shakes so hard the driver cannot hold a lane
Clunk or looseness in the front end at low speed
Intermittent — dealer cannot reproduce on demand
How to Fix
Do not chase this with an alignment alone. Inspect in this order with the front end loaded: track bar joints and the track-bar frame bracket for elongation or loose fasteners (torque to spec, replace the bracket if the hole is wallowed), tie-rod and drag-link ends and their jam nuts, the steering damper (a failed damper alone will not cause the wobble but will let it run away), control-arm and ball-joint play, and wheel balance and tire uniformity — aggressive mud terrains with a bad road-force number are a frequent contributor. Replace the track bar with the updated assembly if any play is found, then re-torque all front-end hardware at the next service. Bring dashcam or phone video to the dealer; 'could not duplicate' is the single most common reason these claims are denied.
NHTSA campaign 26V363000 covers certain 2021-2025 Jeep Wrangler, Wrangler 4xe and Gladiator vehicles. High resistance at the electric-hydraulic power steering pump electrical connection may overheat combustible material and cause a vehicle fire, including while the vehicle is parked with the ignition off. Loss of steering assist or a Service Power Steering message may occur.
Common Symptoms
Loss of power steering assist
Service Power Steering message
Electrical overheating or fire
How to Fix
Check the VIN for campaign 26V363000 (FCA recall 21D). Until repaired, park outside and away from structures and other vehicles. Dealers inspect and repair or replace affected wiring and the electric-hydraulic power steering pump as necessary, free of charge.
JL Wranglers (and the related Gladiator) are widely reported to have vague, loose on-center steering that wanders and drifts at highway speed, forcing constant correction. This is distinct from death wobble — it is excessive play and tracking instability in the steering gear itself. Stellantis acknowledged it with a TSB that replaces the original aluminum-housing steering gear box with an upgraded steel/cast-iron unit; a related steering-damper customer-satisfaction action (V41) was also issued for some 2018-2019 units. NHTSA has logged numerous owner complaints. The steel box tightens on-center feel and reduces wander but does not always fully eliminate tracking sensitivity.
Common Symptoms
Vehicle wanders/drifts and won't track straight on the highway
Constant steering correction required
Loose, vague on-center feel / excessive steering-wheel play
Darting in ruts and crosswinds
Off-center steering wheel when driving straight
How to Fix
Have the dealer perform the steering-gear TSB to install the upgraded steel steering box (4-door PN 68250506AE, superseding 68250506AC/AD) — covered under warranty when the customer can demonstrate the complaint. Verify steering-damper recall/CSN V41 is completed on applicable 2018-2019 units. Confirm proper alignment, tighten/inspect track bar and intermediate shaft, and road-test. Out-of-warranty, the steel box swap runs roughly $700-$1,200 plus alignment.
The solid-axle Dana 30 front end uses pressed-in upper and lower ball joints that wear out on high-mileage Wranglers, especially lifted rigs with larger tires. Worn ball joints introduce play in the steering knuckle, causing clunking over bumps, loose/wandering steering, uneven tire wear, and are a leading mechanical contributor to front-end vibration. A very high-demand maintenance search for older Wranglers.
Common Symptoms
Clunk from front end over bumps
Loose or wandering steering
Vibration through steering wheel
Uneven / cupped front tire wear
Play when rocking the tire top-to-bottom
How to Fix
Replace both upper and lower ball joints as a set once play is detected — Spicer/Dana 706944X, Crown RT21003 heavy-duty set, or Omix 18036.03 kit for TJ; JK uses its own Dana 30 set. Installation requires a ball-joint press (or knuckle off to a shop). Follow with a front-end alignment/toe set. Heavy-duty or rebuildable/greaseable joints are popular on wheeled rigs.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Dana Spicer 706944X upper/lower ball-joint kit, one side
OEMDana Spicer 706944X
Replace a measured-worn TJ upper and lower joint on one side Fitment/availability: 1997-2006 Wrangler TJ/LJ Dana 30/44 front axle; one kit services one side, so quantity two for both sides. Not for JK and not for a damaged/oversize axle …
Chrysler recalled 32 model year 2026 Jeep Wranglers because the child-seat top-tether anchor welds on the second-row right-side seat frame may be insufficient. Under crash loading the anchor can pull away from the frame, so a top-tethered child restraint would not be properly held. NHTSA recorded this as a failure to comply with FMVSS 225, 'Child Restraint Anchorage Systems.' The build population is very small, but the consequence is severe and the remedy is a full seat frame replacement rather than a repair, which indicates the weld defect cannot be corrected in place.
No visible symptom — defect is internal to the seat frame welds
Top tether anchor point feels loose or moves under load
Vehicle appears on the 26V224 recall list by VIN
How to Fix
Check the VIN at NHTSA.gov against Recall 26V224 (FCA 27D). If included, the dealer replaces the second-row right-side seat frame free of charge; owner letters were mailed May 29, 2026. Until the repair is done, install any top-tethered child restraint in the second-row left or center position instead, or use a lower-anchor-plus-tether-free configuration if the seat manufacturer permits it. Do not rely on a visual inspection of the anchor to judge whether the weld is adequate.
A common TJ/LJ Wrangler failure is the steering column clock spring wearing out internally, which breaks electrical continuity to the driver airbag, horn, and cruise-control switches. Owners typically report an illuminated airbag light along with an inoperative horn and cruise control. This was widespread enough to generate many owner complaints and a Jeep recall campaign on certain vehicles.
Common Symptoms
Airbag warning light illuminated
Horn inoperative
Cruise control stops working
Intermittent steering wheel switch functions
SRS fault stored
How to Fix
Diagnosis usually starts by confirming loss of horn/cruise functions and scanning the airbag module for driver squib or clock spring circuit faults. The repair is replacement of the clock spring assembly with the updated part, followed by steering wheel centering and clearing any stored airbag faults. If the steering wheel has been removed previously or the front end alignment is off-center, the new clock spring must be installed in its centered position to avoid repeat failure.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Dorman 525-118 airbag clockspring without cruise control
OEMDorman 525-118
Restore the confirmed clockspring circuit on the 2000 no-cruise branch Fitment/availability: 2000 Wrangler/TJ without cruise control; crosses 56009070/56047103 family. Confirm equipment and VIN; not the speed-control version.
Crown 56047103AB clockspring without speed control
OEMCrown 56047103AB
Restore the confirmed clockspring circuit on the 2001-2002 no-speed-control branch Fitment/availability: 2001-2002 Wrangler TJ without cruise/speed control. Do not use on vehicles equipped with cruise or on 2003-2006.
Restore the confirmed clockspring circuit on the later TJ branch Fitment/availability: 2004-2006 Wrangler/TJ and OE cross 56047144AB-AE. The 2003 catalog uses 56047144AA and must be sourced/confirmed separately; do not silently extend th…
FCA US (Stellantis) recalled certain 2023-2024 Jeep Wrangler models because the steering column control module may not have been welded properly. A module with a faulty weld can prevent the driver's air bag from deploying in a crash, so the Wrangler does not meet Federal Motor Vehicle Safety Standard No. 208, "Occupant Crash Protection." NHTSA campaign 24V199000 covers this defect across a group of Chrysler, Jeep and Ram vehicles; FCA's internal recall numbers are 14B, 33B, 34B, 35B and 36B. Because the defect is inside the steering column, there is nothing an owner can see or hear from the driver's seat — the air bag simply may not fire when it is needed.
Common Symptoms
How to Fix
The repair is free at any Jeep dealer. The dealer inspects the steering column control module and replaces it if necessary. Some owner notification letters went out between April 11 and June 20, 2024, but do not wait for mail — enter your VIN at nhtsa.gov/recalls to see whether your Wrangler is still open for campaign 24V199000, then book the free inspection. FCA US customer service can be reached at 1-800-853-1403.
Chrysler recalled 22,906 model year 2024-2025 Wranglers because the remote start antenna cable can be pinched during assembly. The damaged cable interferes with the tire pressure monitoring system such that the low-pressure telltale never illuminates, so the driver gets no warning of an underinflated tire. NHTSA cited the vehicles as non-compliant with FMVSS 138, 'Tire Pressure Monitoring Systems.' The dangerous part of this defect is that it is silent — the system does not throw a TPMS malfunction indicator, it simply fails to warn.
Low tire pressure warning lamp never illuminates even with a visibly low tire
No TPMS malfunction indicator despite a non-functioning system
Individual tire pressure readouts missing or frozen
Remote start range reduced or intermittent
How to Fix
Have the dealer perform Recall 25V527 (FCA 56C) — inspection and, where damaged, replacement of the remote start antenna cable, free of charge. Owner letters were mailed September 2, 2025. In the meantime treat the vehicle as if it has no TPMS: check all five tires with a gauge at least monthly and before any long trip or towing, and set pressures to the door-jamb placard cold. If the low-pressure lamp has never illuminated even with a deliberately deflated tire, that confirms the fault.
Rust-through of the TJ frame, especially near the lower control arm mounts, skid plate area, and rear trailing arm sections, is one of the most serious age-related Wrangler problems. In rust-belt states, owners report perforation severe enough to affect suspension mounting integrity and vehicle safety inspections. Corrosion often starts from the inside of the boxed frame where mud and moisture collect, so the outside can look better than the structure actually is.
Common Symptoms
Visible rust holes in frame
Flaking metal near control arm mounts
Failed safety inspection
Loose or compromised suspension brackets
Crunching metal when probing frame
How to Fix
A proper inspection requires tapping/probing the frame, checking inside drain holes with a borescope, and closely examining control arm and skid plate mounting areas. Minor corrosion can sometimes be treated and reinforced, but perforated sections usually require welded frame repair caps or full frame replacement. Preventive treatment includes internal frame coating and regular flushing of debris from boxed sections.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Rust Buster RB4011L/R front control-arm frame repair section
OEMRust Buster RB4011L / RB4011R
Professional weld-in structural repair after full mapping confirms corrosion is contained within the compatible front control-arm section Fitment/availability: 1997-2006 Wrangler TJ/LJ, select left RB4011L or right RB4011R to match the d…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
TipInspect the frame from the inside out; many owners find the worst rust by looking through factory holes near the skid plate and control arm brackets.
TipAfter repairs, flush the frame regularly and apply an internal corrosion inhibitor before winter driving.
Distinct from frame corrosion, the steel body tub rusts from the inside out on older Wranglers, especially in salt regions. The spot-welded body-mount channels ('torque boxes') under the floor, the floor-pan seams, and the rocker areas trap moisture and rot around the three body mounts on each side — a critical structural/search topic for buyers of high-mileage TJ/YJ examples.
Common Symptoms
Rust/holes in floor pans
Rotted body-mount channels
Soft/perforated rocker panels
Body shifting or squeaks over the frame
Water intrusion into cabin
How to Fix
Inspect all body mounts and floor seams; light surface rust can be wire-wheeled, treated with a rust converter, and protected with Fluid Film. Rotted torque boxes/floor pans require cut-out and weld-in replacement panels (e.g. NIXFACE full tub body-mount repair kit, C2C Fabrication weld-in floor and torque-box panels) plus new body-mount bushings. Address before any lift or armor install.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Key Parts 0485-317/318 left and right full-length TJ torque-box/floor-support pair
OEMKey Parts 0485-317/318
Weld-in structural repair for perforated full-length body-mount channels on both sides Fitment/availability: 1997-2006 Wrangler TJ only; 16-gauge pair with seat, roll-bar and body-mount nuts. Requires professional measurement, bracing, c…
Renew worn or contaminated body isolators after the TJ torque-box/floor structure is repaired Fitment/availability: 1997-2006 Wrangler TJ and 2004-2006 LJ; includes 11 retainers and 22 mounts but not replacement body-mount bolts. Not a Y…
Energy Suspension 2.4105 YJ body-mount and radiator-support bushing kit
OEMEnergy Suspension 2.4105
Renew YJ body mounts after the repaired structure has been measured and restored Fitment/availability: 1987-1995 Wrangler YJ polyurethane kit; select color. Not a TJ kit, not an OE-rubber equivalent and not a substitute for rotted torque…
Fluid Film AS11 solvent-free lanolin corrosion inhibitor, 11.75-ounce aerosol
OEMFluid Film AS11 / AutoZone 253803
Post-repair protection inside seams/channels and preventive coating on remaining sound metal Fitment/availability: Generic non-drying corrosion inhibitor. Apply only after welding/refinishing is complete and according to product directio…
Stellantis bulletin 31-002-22 applies to 2018-current JL Jeep Wrangler aluminum panels with corrosion or paint bubbling on hoods, hinges, doors, fenders, swing gates or other exterior surfaces. The bulletin warns that ferrous-metal cross-contamination during preparation can lead to galvanic corrosion.
Common Symptoms
Corrosion or paint bubbling on an aluminum exterior panel
Bubbling at a hood, hinge, door, fender or swing-gate area
How to Fix
A qualified repair facility should inspect the aluminum panel and obtain any required authorization. Severely pitted panels may require replacement. Otherwise, the bulletin calls for removing corrosion, preparing the aluminum separately from ferrous metals, applying Mopar anti-corrosion pen 06103087AA, epoxy primer and the specified refinishing system. The cited bulletin does not direct a universal hinge replacement.
JL Wranglers (and Gladiators) are widely reported to have windshields that crack, chip and fracture from minor road debris impacts that would not damage a typical windshield — sometimes within days or a few miles of delivery. The near-vertical windshield and apparently thin glass make it especially vulnerable. A class action alleges 2016-present Wrangler/Gladiator windshields are 'extremely prone' to cracking; NHTSA and forums hold large numbers of owner complaints. FCA began offering an optional Mopar Corning Gorilla Glass windshield as a more durable upgrade, though owners report even those can still crack.
Common Symptoms
Windshield chips or cracks from small rocks/road debris
Cracks spreading rapidly across the glass
Repeated cracking even after replacement
How to Fix
There is no recall; replacement is the only fix once cracked. Owners report better durability from the Mopar Corning Gorilla Glass windshield upgrade. Maintain extra following distance behind trucks, and consider a clear windshield protection film. Check whether comprehensive insurance / glass coverage applies before paying out of pocket.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Mopar 68522631AB/AC Corning Gorilla Glass windshield, base family
OEMMopar 68522631AB (supersedes 68522631AA; current catalog may
Replace a cracked JL windshield with the Mopar Gorilla Glass base configuration after insurance review Fitment/availability: 2018-2023 Wrangler JL only when the VIN/original glass features match the 68522631 family; verify navigation, an…
Mopar 68522634AE Corning Gorilla Glass windshield, camera/heater/antenna family
OEMMopar 68522634AE
Replace a cracked fully equipped JL windshield while retaining the required camera, heater and antenna provisions Fitment/availability: Wrangler JL only when VIN and original glass confirm the 68522634 camera-plus-heater-plus-antenna fam…
The hardtop can leak water into the cabin, particularly around the freedom panels, rear window seals, or the seal where the top meets the body. Water intrusion can wet carpets, seats, and cause electrical issues over time.
Common Symptoms
Water on headliner after rain
Wet floor mats or carpet
Water dripping from rear window area
Musty smell in cabin
Water pooling in footwells
How to Fix
Inspect all seals for proper seating and damage. Replace worn or cracked seals. Ensure freedom panels are properly aligned and latched. Apply seal conditioner to maintain flexibility. Some owners add additional weather stripping for improved sealing.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 68368922AE hardtop front seal
OEMMopar 68368922AE
Replace a torn, shrunken or permanently deformed front/header seal after a zone water test proves this entry path Fitment/availability: 2018-2023 Wrangler JL two- or four-door within the issue range; verify hardtop configuration and VIN.
Genuine Mopar 68368569AE Freedom/Targa center seal
OEMMopar 68368569AE
Replace a damaged center seal only when testing traces water to the joint between the removable panels Fitment/availability: Retail fitment explicitly covers 2019-2023 Wrangler JL in this issue range; VIN-confirm any 2018 application.
AGS Sil-Glyde BK4 rubber-compatible lubricant, 4 oz
OEMAGS BK4
Condition clean, intact roof seals with a light film after panel seating and leak-path inspection Fitment/availability: Universal rubber-compatible maintenance product; not a structural sealant and not a repair for missing foam, damaged …
High Confidence620 owner reportsLast reported by owners Feb 2024Reviewed Feb 2026
The two removable 'Freedom Panel' roof sections over the front seats on hardtop JL Wranglers commonly leak water — most often at the front edge near the windshield header and at the center seam between the panels — allowing water to drip onto the headliner, sun visors, dash and even the radio/center stack. Causes include pinched or misaligned panel seals, improper reinstallation after removing the panels, and seal degradation/shrinkage from UV exposure. It is a widespread, well-documented JL complaint (carried over from JK Freedom Tops) and, while a nuisance rather than a safety defect, can lead to interior water damage and electrical issues if it reaches the radio.
Common Symptoms
Water dripping from the front center of the roof near the windshield onto the dash/radio
Wet headliner, visors, or front floor after rain or a car wash
Leaks worse after frequently removing/reinstalling the Freedom Panels
How to Fix
Clean and properly lubricate the panel and windshield-header seals with a non-greasy silicone/synthetic seal lubricant; reinstall panels correctly (set straight down into the seals starting passenger side, do not slide). Inspect for pinched or shrunken seals and replace damaged seals (often covered under warranty when caught early). Verify the windshield header panel and latch alignment.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Apply the exact TSB foam repair after the prescribed water test identifies the front-center/left panel leak path Fitment/availability: JL Wrangler covered by TSB 23-068-23 symptoms; verify VIN/build and warranty/RSU eligibility first.
AGS Sil-Glyde BK4 rubber-compatible lubricant, 4 oz
OEMAGS BK4
Apply a light maintenance film to clean, undamaged Freedom Panel and header seals after the leak path is corrected Fitment/availability: Non-vehicle-specific silicone-based lubricant stated compatible with EPDM and nitrile rubber. Not a …
A worn steering stabilizer combined with other suspension wear can contribute to 'death wobble' - a violent shaking of the front end at highway speeds, usually triggered by a bump. While the stabilizer alone rarely causes death wobble, it can mask other issues.
Common Symptoms
Violent steering wheel shaking at speed
Front end oscillation triggered by bumps
Wandering steering
Steering feels loose
Wobble that requires stopping to reset
How to Fix
Replace steering stabilizer as part of death wobble diagnosis. Check all steering and suspension components: track bar, ball joints, tie rod ends, control arm bushings. Proper alignment essential. Upgrading to heavy-duty stabilizer helps but doesn't fix root cause.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Bilstein 24-158428 HD monotube steering stabilizer
OEMBilstein 24-158428
Replace a confirmed leaking, binding or ineffective steering damper after root-cause steering inspection Fitment/availability: 2007-2018 Wrangler JK two-door or Unlimited four-door with compatible OE-style mounts; distinguish 2018 JK fro…
Replace a confirmed worn OE-height front track bar after inspecting its bolts and brackets Fitment/availability: 2007-2018 Wrangler JK two-door or Unlimited four-door at stock/compatible geometry; lifted vehicles may need an adjustable b…
High Confidence1,650 owner reportsLast reported by owners Feb 2024Reviewed Feb 2026
Chrysler recalled 641 model year 2026 Jeep Wrangler and Gladiator vehicles because the wall thickness of the factory steel wheels is below specification. The thin walls can crack and, in the worst case, allow the wheel to separate from the vehicle, causing loss of control. This affects only trucks delivered on steel wheels — the base Sport and Willys-style configurations — not the cast aluminum wheels fitted to Sahara and Rubicon. The remedy also covers valve stems, which suggests the affected wheels are being replaced as an assembly rather than reworked.
Hairline cracks in the steel wheel rim or around the bolt holes
Repeated slow air loss from one wheel with no puncture found
Vibration or wobble that appears suddenly
Wheel separation or loss of control
How to Fix
Have the dealer perform Recall 26V456 (FCA 05D) — inspection and replacement of the steel wheels and valve stems as necessary, free of charge. Owner notification letters are expected September 4, 2026 and VINs became searchable at NHTSA.gov on July 23, 2026. Before the repair, inspect each steel wheel around the bead seat and the bolt-hole area for hairline cracks and check for slow air loss; any crack or repeated pressure loss means the truck should be trailered rather than driven to the dealer.
Front (and sometimes rear) sealed wheel hub/bearing assemblies are a high-wear item on JK and JL Wranglers, especially on lifted rigs running larger tires that load the bearing harder. As the bearing wears it produces a speed-dependent grinding, rumbling, or humming that changes when turning, and free play can be felt by rocking the tire at the 12-and-6 positions. Because the ABS wheel-speed sensor (tone ring/sensor) is integrated into the hub assembly on these models, a failing hub commonly damages the sensor and triggers ABS and traction-control (ESC) warning lights along with disabled stability control. The common service hub assembly for 2007-2016 5-lug JK with ABS is part 513272 (Mopar/MOOG/Timken/Spicer equivalents); note a JK hub part-number change around 2011, so the correct year-specific part must be used.
Confirm the bad corner by road-test noise direction and the 12/6 rock test for play. Replace the complete hub/bearing assembly (the integrated ABS sensor is part of the unit). For 2007-2016 5-lug JK with ABS the common service part is assembly 513272 (Mopar/MOOG/Timken/Spicer equivalents); verify the correct part for your year due to the ~2011 design change. Inspect/clean the ABS connector and clear codes; the ABS/ESC lights should extinguish once the hub and its sensor are replaced.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 52060398AC front hub and bearing
OEMMopar 52060398AC
Replace a confirmed failed early-JK front unit bearing Fitment/availability: 2007-2010 Wrangler JK/Unlimited, front left or right.
Replace a confirmed failed JL front unit bearing Fitment/availability: 2018-2025 Wrangler JL front left or right within the issue range; 2018 must be JL, not JK. Preserve/test the separately serviced wheel-speed sensor and confirm VIN/ax…
Rubicon models use an electronic front sway-bar disconnect actuator (motor + gear + control electronics) so the bar can be uncoupled for off-road articulation. The actuator housing has poor sealing, and water from everyday puddles, rain, or shallow fording (well under the advertised wading depth) corrodes the internal motor, harness, and electrical contacts. The result is a sway bar that won't disconnect, won't reconnect (a safety concern at highway speed because it leaves the front bar uncoupled), and a 'Service 4WD' warning. Corrosion at the connector can also create a parasitic battery drain. The actuator is not serviceable as individual parts — Mopar sells the motor only as part of the complete actuator assembly, making it an expensive repair, which is why many owners convert to a manual disconnect.
Common Symptoms
Sway bar will not disconnect when the button is pressed
Sway bar will not reconnect/lock for highway driving
Service 4WD warning light illuminated
Sway bar disconnect light flashing or stuck on
Green corrosion on the actuator electrical connector
Parasitic battery drain / dead battery traced to the disconnect circuit
Failure appears or worsens after rain or a water crossing
How to Fix
Diagnose with a scan tool for sway-bar/4WD fault codes and inspect the actuator connector for green corrosion and water intrusion. Cleaning and re-seating a corroded connector or applying dielectric grease can restore function early on. Once the internal motor is corroded, replace the complete Mopar front disconnect stabilizer-bar actuator (PN 68044411AC); the bar assembly itself is PN 52060300AK. Many off-roaders instead install an aftermarket manual disconnect (e.g., EVO/Currie/Teraflex) to permanently eliminate the electronic failure point. Seal/relocate the connector and add dielectric grease to slow recurrence.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 68044411AC JK electronic stabilizer-bar actuator
OEMMopar 68044411AC
Replace the JK actuator after electrical testing and internal corrosion/failure are confirmed and the bar mechanism is serviceable Fitment/availability: 2007-2018 Wrangler JK Rubicon electronic-disconnect application; supersedes AA/AB.
Genuine Mopar 68251037AC complete front electric-disconnect stabilizer bar
OEMMopar 68251037AC / supersession 68601966AB
Complete early-JL bar/module replacement when the internal disconnect mechanism or integrated assembly is failed Fitment/availability: Cataloged 2018-2021 Wrangler JL application and superseded by 68601966AB; select by VIN/Rubicon equipm…
NHTSA campaign 23V116000 covers certain 2018-2023 Jeep Wrangler vehicles equipped with manual transmissions. The clutch intermediate pressure plate may overheat and fracture, potentially cracking the transmission case and expelling heated debris. The debris may contact an ignition source and cause a fire; clutch odor, slippage or cluster messages may occur first.
Common Symptoms
Clutch odor
Clutch slippage
Cluster warning message
Fractured pressure plate
Heated debris or fire
How to Fix
Check the VIN for campaign 23V116000 (FCA recall 19A). Dealers replace the clutch assembly and update the software free of charge. Campaign 23V116 expands and replaces 21V028, so vehicles repaired under the earlier campaign still require the newer remedy.
The JL Wrangler with manual transmission can experience clutch issues including premature wear, judder, and difficulty engaging gears. Some owners report clutch failures at relatively low mileage, particularly with off-road or aggressive driving.
If under warranty, have dealer inspect clutch. Clutch replacement required if worn. Consider upgraded clutch for off-road or towing use. Proper clutch technique helps longevity - avoid riding the clutch or aggressive launches.
Owner tips & cautions
TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
TipSearch Jeep Wrangler forums and owner groups for real-world experiences and DIY guides
TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
Medium Confidence420 owner reportsLast reported by owners Feb 2024Reviewed Feb 2026
JK Wranglers with the 42RLE 4-speed automatic exhibit a torque-converter-clutch (TCC) shudder felt as a steady-state vibration or shimmy, typically during light throttle/partial converter lockup and most noticeable when the transmission is at moderate operating temperature. Chrysler acknowledged the condition in TSB 21-001-08 (later revisions), which addresses TCC shudder and shift-quality concerns (1-2, 2-3, 3-4 upshift bumps) and DTC P0732. The shudder stems from the converter clutch lining/fluid interaction and TCM calibration; left unaddressed it can progress to harsh shifts.
Common Symptoms
Steady-state shudder/vibration at light throttle (~30-50 mph)
Shudder most pronounced at moderate transmission temperature
Upshift bumps on 1-2, 2-3, or 3-4 changes
Sensation like driving over rumble strips during cruise
DTC P0732 (gear ratio) in some cases
How to Fix
Per Chrysler TSB 21-001-08 Rev. B: reflash/reprogram the PCM/TCM with updated software and replace the torque converter as required. Confirm correct fluid level and use the specified ATF+4 fluid; a fluid/filter service with fresh ATF+4 sometimes reduces mild shudder. If shudder persists after the reflash, the torque converter is replaced. Verify with a road test across the temperature range where the shudder occurred.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Converter replacement when true TCC/EMCC shudder is reproduced and the applicable service branch requires revised-friction hardware Fitment/availability: 2007-2011 Wrangler 3.8L/42RLE family after VIN confirmation; supersedes 05093944AB …
Genuine Mopar 68218057AC ATF+4 automatic-transmission fluid, one quart
OEMMopar 68218057AC
Required licensed fluid for a diagnosed 42RLE service or refill after converter replacement Fitment/availability: One-quart ATF+4 bottle; use the service-manual quantity and temperature-based level procedure. Not a standalone cure and no…
Genuine Mopar 68059549AA 42RLE transmission filter with 6032780 O-ring
OEMMopar 68059549AA + 6032780
Filter and pickup-seal renewal when pan inspection/service is part of the confirmed repair Fitment/availability: 2003-2011 Wrangler TJ/JK equipped with 42RLE; includes the specified O-ring. Confirm transmission and do not install as a su…
Wranglers equipped with the ZF-based 8-speed automatic (845RE/850RE/8HP) are widely reported to shift harshly or jerk, especially the 1-2 shift and when accelerating from a stop, plus delayed engagement when moving from Park to Drive or Reverse. Many cases are resolved by a Transmission Control Module (TCM) software/calibration reflash, while others stem from low or degraded transmission fluid, a failing valve body, or a worn shift solenoid. NHTSA and J.D. Power survey data show higher-than-class-average shifting complaint rates. Unexpected downshifts that flare engine RPM and overheating during towing/off-road are also documented.
Start with the latest TCM/PCM calibration flash from the dealer (many harsh-shift complaints are a software fix). Verify transmission fluid level and condition using the correct fill procedure and ZF-spec fluid; perform a fluid/filter service if dark or burnt. If shifting faults persist, diagnose the valve body and shift solenoids; relearn shift adaptives after any service. Severe internal failures require valve body or transmission replacement.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Separate filter branch for a VIN-confirmed non-PHEV JL eight-speed pan-drop service Fitment/availability: Shown with the 68362041AC metal-pan family in Mopar diagrams. Confirm transmission, engine and VIN; do not apply automatically to t…
Wranglers equipped with the Mercedes-sourced NSG370 6-speed manual can develop hard shifting, grinding, and a tendency to jump out of first gear or other gears. Owners often describe the issue as worsening when cold, with synchronizer wear and internal shift component wear being common root causes. This problem is widely discussed in TJ/LJ communities and appears repeatedly in owner complaints and service literature.
Common Symptoms
Transmission pops out of first gear
Grinding during shifts
Notchy shifting when cold
Difficulty engaging gears
Shifter movement under load
How to Fix
Diagnosis includes confirming the transmission model, checking fluid type and level, inspecting shifter/linkage condition, and road-testing for gear disengagement under load or decel. Some cases improve with the correct Mopar-spec manual transmission fluid, but worn synchronizers or internal shift components require transmission rebuild or replacement. Clutch release issues should also be ruled out before opening the gearbox.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Replace the confirmed worn 1-2 synchronizer during an NSG370 teardown Fitment/availability: 2005-2006 Wrangler/TJ with NSG370; professional teardown required.
Correct an incorrect or degraded fluid fill before condemning internal transmission parts Fitment/availability: NSG370 requiring Chrysler MS-9224; approximately two quarts are needed, but verify service-manual capacity.
The in-tank fuel pump module (pump, sending unit, and level float) wears out on high-mileage TJ Wranglers, producing a loud whine from the tank, hard starting, stalling, and eventual crank-no-start as fuel pressure drops. A top-searched TJ fuel-system failure, sometimes accompanied by an inaccurate fuel gauge from the same module.
Replace the complete fuel pump module (not just the motor) after confirming low fuel pressure. Match the tank size: 97-02 TJ 19-gallon uses modules such as Bosch 67756 / Omix; 03-04 TJ 2.4L/4.0L uses Crown 5093788AA. Inspect the tank and strainer, and replace the pump-to-tank seal. Verify 15- vs 19-gallon tank before ordering.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown 5012951AD complete fuel-pump/level module
OEMCrown 5012951AD
Replace a confirmed failed complete module in the small-tank early branch Fitment/availability: 1997-1999 Wrangler TJ 2.5L or 4.0L with 15-gallon tank only; verify tank capacity and connector before ordering.
Replace a confirmed failed complete module in the 19-gallon early branch Fitment/availability: 1997-2002 Wrangler TJ 2.5L or 4.0L with 19-gallon tank only; verify tank capacity, connector and sender resistance before ordering.
Replace a confirmed failed complete module in the 2003-2004 branch Fitment/availability: 2003-2004 Wrangler TJ/Unlimited 2.4L or 4.0L; select exact 5093788AA/AB module and verify VIN/connector. Do not use an early 15- or 19-gallon module.
Replace a confirmed failed complete module in the 2005-2006 branch Fitment/availability: 2005-2006 Wrangler TJ/Unlimited 2.4L or 4.0L; verify VIN/connector and sender resistance.
Renew the tank-to-module seal when servicing the late TJ module Fitment/availability: 2005-2006 Wrangler TJ/Unlimited; later-style O-ring. Some complete modules already include it, so check kit contents before ordering.
Many 2005-2006 TJ Wranglers develop a failed fuel tank inlet check valve that causes the gas pump nozzle to click off repeatedly or spit fuel back out of the filler neck. Owners report fuel spraying down the quarter panel or onto the ground near the end of fill-up, creating both inconvenience and fire risk. This issue became widespread enough to generate a Chrysler recall campaign on certain vehicles.
Common Symptoms
Fuel nozzle clicks off repeatedly
Gasoline spits back out of filler neck
Fuel spills during fill-up
Strong fuel smell after refueling
Unable to fill tank normally
How to Fix
Diagnosis is based on repeat refueling shutoff/blowback behavior with no external filler obstruction. The proper fix is replacement of the fuel tank module or tank assembly components specified by the recall or service procedure, not just changing the gas cap. If the vehicle was not covered or the recall was already performed, owners typically replace the affected tank/check-valve assembly.
Owner tips & cautions
TipIf the pump starts clicking off, do not keep topping off aggressively; owners report the worst spray-back happens near the end of the fill.
TipCheck VIN recall status first, because some Wranglers were repaired under the factory campaign.
The throttle-body-mounted TPS wears and produces an erratic voltage signal, causing high/hunting idle, stalling at stops, hesitation or bucking on acceleration, and — on automatics — erratic or harsh shifting. A very common, high-search TJ driveability complaint that often illuminates the check-engine light.
Common Symptoms
High or hunting idle
Stalling when coming to a stop
Hesitation/bucking on acceleration
Erratic or harsh automatic shifting
Check-engine light
How to Fix
Confirm with a scan tool (P0121/P0122/P0123) and swap in a quality TPS — Mopar 04874371AC (superseded by 68433984AA). Owners strongly recommend Mopar, Standard Ignition, or NGK over cheap economy sensors, which frequently fail again. Verify closed-throttle voltage and idle relearn after install.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Omix 17224.04 throttle-position sensor
OEMOmix 17224.04
Replace a circuit-tested TPS on the early throttle-body branch Fitment/availability: 1997-2001 Wrangler TJ 2.5L or 4.0L; verify connector and throttle-body/tang geometry before ordering.
Replace a circuit-tested TPS on the later throttle-body branch Fitment/availability: 2002-2006 Wrangler TJ/Unlimited with 2.4L or 4.0L as cataloged; verify VIN and connector.
The fuel-level sending unit, integrated with the in-tank fuel pump module, develops a worn resistance card or a bent/sticking float arm with age. This causes the fuel gauge to read inaccurately, stick (often above or below a certain level), drop suddenly, or trigger a false low-fuel light. On JL models it can also set P0463 (fuel-level sensor circuit high) and on inclines the gauge may briefly read empty until the vehicle is back on level ground. A persistent fault sometimes traces to chassis-harness wiring rather than the sender itself.
Common Symptoms
Fuel gauge reads inaccurately or sticks
Gauge drops or jumps suddenly
False low-fuel warning light
Gauge reads empty on an incline, normal on level ground
DTC P0463 / fuel-level circuit codes (JL)
How to Fix
Verify with a scan tool (look for P0461/P0462/P0463) and test sender resistance through its range with a multimeter; a faulty sender reads out of the expected ohm band. Replace the fuel-level sender/fuel-pump module assembly (the sender is part of the in-tank pump module on these models). If a new sender doesn't fix it, inspect/repair the chassis wiring harness to the tank — some JL cases were resolved only by harness replacement. Confirm correct part for the specific tank/engine.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 68003339AG fuel pump/level unit module kit
OEMMopar 68003339AG
Replace a test-confirmed sender/module fault on the early JK build branch Fitment/availability: 2007-2011 Wrangler JK 3.8L built up to and including 03/30/2011; confirm VIN/build date and tank option.
Genuine Mopar 68065575AF fuel pump/level unit module kit
OEMMopar 68065575AF
Replace a test-confirmed sender/module fault on the late-JK build branch Fitment/availability: Wrangler JK built after 03/30/2011 through 2018, primarily 3.6L within this issue; 2018 must be JK. Confirm VIN/tank option; not JL.
Genuine Mopar 68723023AA 3.6L fuel pump/level unit module kit
OEMMopar 68723023AA
Replace a test-confirmed sender/module fault on the JL 3.6L gasoline branch Fitment/availability: 2018-2022 Wrangler JL 3.6L gasoline/eTorque within this issue; product coverage extends later.
Genuine Mopar 68723024AA 2.0L fuel pump/level unit module kit
OEMMopar 68723024AA / supersedes 68403980AF
Replace a test-confirmed sender/module fault on the JL 2.0L gasoline branch Fitment/availability: 2018-2022 Wrangler JL 2.0L non-PHEV gasoline within this issue; select the current 68723024AA supersession of 68403980AF and confirm VIN/tank.
The Dana 35 rear axle fitted to most non-Rubicon YJ/TJ Wranglers uses a C-clip design: each semi-float axle shaft is retained inside the housing only by a C-clip seated in the differential. If a shaft snaps — common with 33-inch-plus tires, a locker, or aggressive trail use — the wheel and outer shaft can slide completely out of the housing ("grenade"), damaging brakes and potentially separating the wheel while driving. A top-searched off-road reliability weak point.
Common Symptoms
Sudden loss of drive to one rear wheel
Wheel shifting outward or falling out
Clunk/bang from rear axle under load
Metal shavings in diff fluid
How to Fix
For stock use, keep tire size sane and inspect shafts/seals. For lifted or wheeled rigs, upgrade to chromoly/one-piece shafts, install a C-clip eliminator kit, or swap to a Dana 44 / Ford 8.8 rear axle. Crown/Omix replacement Dana 35 C-clips and shafts (e.g. Crown 5012826AA shaft) are available for repair; a broken shaft requires pulling the diff cover to retrieve the clip and inner stub.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown 5252505 Dana 35 rear axle-shaft C-clip
OEMCrown 5252505
Replace a lost, distorted or damaged stock-style retainer during a confirmed Dana 35 shaft repair Fitment/availability: 1994-1995 YJ and 1997-2006 TJ with Dana 35 C-clip rear axle; sold individually.
Crown RT23001 27-spline chromoly Dana 35 axle-shaft pair
OEMCrown RT23001
Stronger direct-replacement shaft pair for the compatible early drum-brake Dana 35 branch Fitment/availability: 1994-1995 YJ and 1997-2002 TJ with Dana 35, factory 27-spline carrier and drum brakes; includes bearings, seals and retainers…
Lifted Wranglers commonly experience driveshaft vibration due to changed driveline angles. Even stock Wranglers can have premature U-joint wear. The double-cardan front shaft is particularly prone to issues.
Common Symptoms
Vibration at 40-50 mph
Clunking when shifting 2WD to 4WD
Death wobble after hitting bump
Grinding from front driveshaft
U-joint caps rusted or seized
How to Fix
For lifted Jeeps: Install adjustable control arms to correct pinion angle. Upgrade to CV (constant velocity) driveshaft ($400-800) which handles extreme angles better. Replace worn U-joints with Spicer or Dana units. Grease all zerks every oil change. For severe vibration, transfer case drop kit may help ($100-200).
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Tom Wood's front 1310 double-cardan driveshaft for JK
OEMTom Wood's / Quadratec 52301-9900 or 52301-9920
Complete front-shaft replacement/upgrade after CV-joint, tube or lift-angle diagnosis confirms the front shaft path Fitment/availability: 2007-2018 Wrangler JK two- or four-door, with separate 2007-2011 and 2012-2018 selections; not 2018…
Tom Wood's rear 1310 double-cardan driveshaft for two-door JK
OEMTom Wood's / Quadratec 52301-9801 or 52301-9821
Complete rear-shaft replacement/upgrade after diagnosis confirms the compatible two-door rear branch Fitment/availability: 2007-2018 Wrangler JK two-door only, with separate 2007-2011 and 2012-2018 selections. Do not use for Unlimited fo…
High ConfidenceVerified2,341 owner reportsLast reported by owners Feb 2024Reviewed Feb 2026
A distinct, well-populated complaint pattern emerged in 2026 from 4xe owners who had already had Recall 68C / 25V741 performed. After the HV battery software reflash, electric-mode output is progressively cut back — first to roughly 50%, then 25%, then 'Electric Mode Temporarily Unavailable' — at battery states of charge as high as 41-81%, well above the point where the manufacturer's own specification says electric drive should continue. During the handover from electric to hybrid operation there is a delay of up to ten seconds in which the accelerator pedal produces nothing at all, followed in some cases by an abrupt surge when the gasoline engine catches. Multiple owners with prior 4xe experience (one with over 50,000 miles across two Wrangler 4xes) state explicitly that the vehicle behaved normally before the recall repair and would no longer climb minor hills in electric mode afterward. Reports cluster from December 2025 through July 2026.
Common Symptoms
'Electric Mode Temporarily Unavailable' message with usable charge remaining
Electric output stepped down to about 50% then 25% before shutting off
Dead accelerator pedal for several seconds during the EV-to-hybrid handover
Sudden surge forward when the gas engine takes over
Sluggish or no acceleration in electric mode at highway speed
Symptoms began only after the 68C / 25V741 recall repair
How to Fix
There is no published remedy for the post-recall calibration behavior as of August 2026. Document each event with date, speed, indicated state of charge and the exact dash message, and have the dealer open a STAR case rather than accepting 'operating as designed.' Ask the dealer to pull hybrid control processor and battery pack manager stored data during the visit and to verify the flash level against the latest 68C calibration, since some vehicles received the interim rather than final software. File an NHTSA complaint — the loss of acceleration on merges and left turns is a reportable safety defect and complaint volume is what drives a follow-up campaign.
The NP231 (Command-Trac) transfer case in YJ/TJ Wranglers uses a slip-yoke rear output. The rear output shaft seal is a chronic leak point — the exposed slip yoke picks up grit and rust that scores the seal, and a worn tail-housing bushing lets the yoke move and tear the seal. Result is ATF weeping from the back of the t-case, a very common older-Jeep drivetrain search.
Common Symptoms
ATF/gear-oil leak at rear of transfer case
Fluid on the rear driveshaft and skid plate
Low transfer case fluid
Driveline vibration if bushing worn
How to Fix
Replace the rear output shaft seal (National/SKF 18662 or equivalent) after cleaning/inspecting the yoke and tail bushing; tape over the retainer-clip groove during install so the seal lip glides past it. If the tail bushing is worn or a lift causes driveline vibration, install a Slip-Yoke Eliminator (SYE) kit with a fixed yoke and a CV driveshaft (Rugged Ridge/Omix 18676.62 housing seal). A basic seal fix is inexpensive.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 4638904 rear output seal
OEMMopar 4638904
Reseal the stock NP231 rear output after inspecting the yoke and tail bushing Fitment/availability: 1994-1995 Wrangler YJ with the stock NP231 slip-yoke output; confirm transfer-case tag and VIN.
Reseal the stock external-slip-yoke rear output after confirming the housing and transfer case Fitment/availability: 1997-2006 Wrangler TJ with stock NP231 configuration; exclude 2003-2006 Rubicon NV241OR and any vehicle already converte…
Optional fixed-yoke conversion when inspection finds a worn stock tail housing or lift-related driveline geometry requires it Fitment/availability: 1988-2006 YJ/TJ/Unlimited with NP231 only; not NV241OR. Requires a separately measured lo…
On the Jeep Wrangler JK/JL, P0430 almost always points to a worn-out catalytic converter on the driver's side (Bank 2 is the driver side on the Jeep V6 — the reverse of many V-engines). The catalyst monitor compares the upstream and downstream oxygen sensors; as the converter's oxygen-storage capacity degrades, the downstream (Bank 2, Sensor 2) O2 signal begins to mirror the upstream sensor and the PCM sets P0430. On the 2012+ 3.6L Pentastar the primary converters are integrated into the exhaust manifolds, so a converter that has been contaminated by an upstream misfire or oil consumption (the 2011-2013 Pentastar left/Bank-2 cylinder-head tick is a classic precursor) is common. Before condemning the cat, a leaking exhaust flange or a lazy downstream O2 sensor should be ruled out, since either can mimic the code.
Common Symptoms
Check engine light on
Reduced fuel economy
Rotten-egg / sulfur exhaust smell
Sluggish acceleration in some cases
Often no obvious drivability change
How to Fix
Confirm with live O2 data at ~2000 RPM — a healthy downstream sensor stays fairly steady while the upstream fluctuates; if the downstream tracks the upstream, the converter is spent. Inspect for exhaust leaks and seized manifold bolts first. The accepted repair is replacing the Bank 2 catalytic converter (or manifold-with-integrated-cat on the 3.6L), and often the downstream O2 sensor at the same time. Address any underlying misfire or oil-consumption cause so the new converter isn't damaged.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown Automotive 52059930AH front exhaust pipe with four catalytic converters
OEMCrown 52059930AH
Replace the confirmed failed catalyst assembly on the early 3.8L branch Fitment/availability: 2007-2009 Wrangler JK 3.8L; federal/EPA application only as listed, not CARB-approved. Verify emissions label and state legality before purchase.
Genuine Mopar 68040901AB front catalytic-converter assembly
OEMMopar 68040901AB
Replace the confirmed failed catalyst assembly on the late 3.8L branch Fitment/availability: 2010-2011 Wrangler JK 3.8L; verify VIN, emissions family and CARB/EPA legality because retailer emissions claims conflict.
Replace the confirmed failed Bank 2 converter on the 3.6L branch Fitment/availability: 2012-2018 Wrangler JK 3.6L, left/driver Bank 2; verify VIN and emissions certification.
P0442 on the Wrangler flags a small (~0.020-0.040 in) leak in the evaporative emissions system. On these Jeeps the two most common real-world sources are a loose, worn, or cracked fuel cap seal and a cracked rubber elbow/vent hose at the charcoal canister near the rear of the vehicle. Wranglers see a lot of trail dust, water crossings, and vibration, which ages the small rubber EVAP elbows and the o-ring on the fuel cap. Less commonly the purge valve, leak-detection pump, or the filler neck itself is the culprit. The code is emissions-only and typically causes no drivability problem, but it will fail an emissions/inspection test.
Start with the cheapest checks: make sure the fuel cap is clicked tight and inspect (or simply replace) the cap and its o-ring. If the code returns, smoke-test the EVAP system to pinpoint the leak — pay special attention to the vapor lines and the rubber elbow at the charcoal canister and to the purge and vent valves. Replace the failed cap, hose, valve, or canister as found and clear the code; the readiness monitor needs a few drive cycles to reset.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 52030387AB fuel-filler cap
OEMMopar 52030387AB
Replace a damaged or leaking cap after cap-seal and filler-neck inspection Fitment/availability: 2007-2018 Wrangler JK 3.8L/3.6L; distinguish 2018 JK from JL by VIN/body.
Replace a damaged or leaking cap on the applicable JL branch Fitment/availability: 2018-2019 and 2021 Wrangler JL 2.0L or 3.6L as cataloged; verify VIN.
Replace a damaged or leaking cap on the 2020 JL gasoline branch Fitment/availability: 2020 Wrangler JL 2.0L or 3.6L only; verify VIN. Fitment/availability: $34.31 shown; verify current checkout availability before ordering
The JK-generation Jeep Wrangler uses Chrysler's Natural Vacuum Leak Detection (NVLD) approach for its evaporative emissions (EVAP) system, implemented through a leak detection device commonly called the ESIM (Evaporative System Integrity Module) or leak detection pump (LDP). Rather than an active vacuum pump, this module monitors natural temperature-induced pressure/vacuum changes in the fuel/EVAP system to confirm the system is sealed. The ESIM is a known, high-frequency failure point: its internal diaphragm/seal hardens or cracks (or the housing cracks), causing the ECM to falsely detect an EVAP leak even when the system is actually sealed. The result is a check-engine light and one of several EVAP leak codes. Because the very first thing the code points the owner toward is the fuel cap, this failure is routinely misdiagnosed: owners (and shops) replace the gas cap one or more times, the light returns, and the actual culprit is the cheap ESIM/leak-detection module bolted to the charcoal canister. The module is a small white rectangular unit that twists/mounts onto the EVAP charcoal canister, located beneath the vehicle near the fuel tank / just ahead of the rear axle (driver side on most JKs). It is non-safety, non-drivability affecting, but it will cause a persistent CEL and an emissions/smog-test failure. This affects the 3.8L V6 (2007-2011) and 3.6L Pentastar (2012-2018) JK Wranglers, including 2-door and Unlimited 4-door.
Common Symptoms
Check-engine light (MIL) illuminated
"GASCAP" / loose-fuel-cap warning message in the instrument cluster even when the cap is tight
P0455, P0456, and/or P0457 stored as the only codes
Check-engine light returns shortly after replacing or re-tightening the gas cap
Occasional faint fuel-vapor odor near the rear of the vehicle
Fails emissions / smog inspection (EVAP monitor not ready or DTC present)
No noticeable change in engine performance, power, or fuel economy
How to Fix
Diagnose in order of cost. (1) First, confirm the gas cap clicks shut and is not cracked; if the cap is worn, replace with an OEM Mopar cap (P0457 / "GASCAP" message especially). A cap is the cheapest fix (under $30). (2) If the light returns after a known-good cap, perform a smoke test of the EVAP system to find any cracked vapor hose, leaking purge valve, or split canister before condemning the module. (3) If no external leak is found and codes persist (classic for P0456 small-leak and P0455 large-leak with no physical leak present), replace the ESIM / leak detection pump on the charcoal canister. The module is widely available (e.g., Standard Motor Products LDP14 and Mopar equivalents) and the replacement is a DIY-friendly job — typically under 30 minutes, no special tools, by twisting the module off the canister and installing the new one. Always install the new O-ring/seal supplied with the module; a poor seal will recreate the leak code. After replacement, clear the codes and complete a drive cycle so the EVAP monitor can re-run and confirm the repair. Note: if the failure is actually the charcoal canister itself (cracked) rather than just the module, the repair is more involved and more expensive.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Dorman 310-215 Evaporative System Integrity Module
OEMDorman 310-215
Replace a test-confirmed failed ESIM after the cap and external EVAP system pass inspection/smoke testing Fitment/availability: Specific-fit ESIM cross for 2007-2018 Jeep applications and OE 4861962AA-AD/4891685AA-AB; confirm the Wrangle…
Genuine Mopar 52030387AB non-locking tethered fuel cap
OEMMopar 52030387AB
Replace a cracked, hardened or non-sealing cap as the lowest-cost confirmed leak path Fitment/availability: 2007-2018 Wrangler JK gasoline branch within this issue; the product also fits 2003-2006 TJ.
The 2.0L turbocharged four-cylinder (GME-T4) is prone to recurring low-coolant warnings and external coolant leaks. Heat radiating off the turbocharger embrittles the plastic coolant 'Y' fitting and the coolant overflow/recovery reservoir, causing them to crack and weep. Separately, Stellantis issued a customer satisfaction notification for 2021-2022 2.0L JLs covering coolant seepage from the coolant inlet tube fasteners, with the fix being removal of the fasteners, application of thread sealant, and reinstallation. Owners report having to repeatedly top off the recovery bottle. If a coolant leak migrates internally it can contaminate the oil and eventually damage bearings, so persistent low-coolant should be diagnosed promptly.
Common Symptoms
Low coolant warning light
Repeatedly topping off coolant recovery bottle
Sweet coolant smell
Visible coolant residue near turbo / Y-fitting
Cracked plastic coolant reservoir
White exhaust smoke if internal
How to Fix
Pressure-test the cooling system to locate the leak. For the brittle plastic 'Y' fitting and reservoir, replace with the updated parts (aftermarket all-metal Y-fittings are available as a permanent fix). For the coolant inlet tube fastener seep, perform the customer-satisfaction-notice procedure: remove fasteners, apply thread sealant, torque to spec. Replace the lower radiator hose-to-water-pump inlet hose if it is the source per the related TSB. Confirm no oil/coolant cross-contamination before returning to service.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mopar 68280800AE coolant-bottle outlet hose with molded tee
OEMMopar 68280800AE
Confirm VIN and current fitment; not for the 3.6L or an inlet-tu
Recovery-bottle replacement when controlled pressure testing proves the bottle body or seam is cracked Fitment/availability: Cataloged Wrangler JL 2.0L turbo/2.0L PHEV recovery-bottle branch; confirm VIN and engine, and inspect the cap a…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
The 3.6L Pentastar JK uses a single electric radiator fan driven by a pulse-width-modulated (PWM) duty-cycle signal from the TIPM rather than a simple on/off relay. The integrated fan motor/controller fails, or the PWM signal circuit faults, so the fan won't spin up at speed — causing overheating in traffic and on trails and setting P0480 (Cooling Fan 1 Control Circuit). Because the fan is commanded by the TIPM through a 3-wire design, the fault can lie in the fan module, the signal wire, grounds (G102 near the passenger headlight), or the TIPM itself, which makes it tricky to diagnose. Overheating risks head/gasket damage on a Pentastar.
Common Symptoms
Engine overheats at idle / low speed / in traffic
Temperature climbs while crawling off-road
Radiator fan not spinning or not ramping to high speed
Check-engine light with P0480
A/C performance drops because condenser airflow is lost
How to Fix
Scan for P0480 and confirm whether the fan responds to the PWM command. Check the fan ground at G102 and the brown/light-blue signal wire from the TIPM before condemning parts. Replace the electric cooling-fan module/assembly if the integrated motor/controller is dead; if commands aren't reaching the fan, investigate the TIPM (overlaps the known TIPM-failure issue). Verify coolant level/condition and that the radiator isn't clogged. Test by idling with A/C on and confirming high-speed fan engagement.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Dorman 621-601 complete brushless radiator fan and shroud assembly
OEMDorman 621-601
Complete fan-module replacement after commanded testing confirms correct power/ground/control but failed fan response Fitment/availability: 2012-2017 Wrangler and 2018 Wrangler JK 3.6L application; crosses Mopar 68143894AA/AB. Confirm ex…
The TJ/LJ Wrangler commonly develops coolant leaks from the plastic radiator end tanks, especially near the upper hose neck or crimp seam. Heat cycling and age make the plastic brittle, and owners often first notice a sweet smell, dried coolant residue, or overheating in traffic or on trails. This is one of the most frequently discussed age-related failures on 2000-2006 Wranglers.
Common Symptoms
Coolant smell after driving
Visible coolant leak near radiator tank
Low coolant level
Engine running hot at idle
Dried white or orange residue on radiator
How to Fix
Pressure-test the cooling system and inspect the radiator tanks, seams, and hose necks for seepage or cracks. The standard repair is radiator replacement, usually along with fresh coolant, cap inspection, and replacement of aged hoses if needed. Many owners upgrade to a quality all-aluminum or heavy-duty replacement radiator for improved durability.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown Automotive 52080183 replacement radiator
OEMCrown 52080183
Replace a pressure-test-confirmed cracked or leaking radiator Fitment/availability: 2000-2006 Wrangler TJ/Unlimited 2.4L, 2.5L or 4.0L with manual or automatic transmission. Automatic applications use the integrated cooler fittings; veri…
Replace a cap that fails pressure/seal inspection during the radiator repair Fitment/availability: 2000-2006 Wrangler TJ/Unlimited 2.4L, 2.5L or 4.0L with an OE-style radiator neck; verify cap-to-neck engagement on any aftermarket radiator.
Owners across JK and JL hardtops report the rear (and occasionally quarter) tempered glass spontaneously exploding into pebbles with no impact — often while parked or driving normally. Tempered glass can fail from manufacturing-induced internal stress (nickel-sulfide inclusions, tempering-oven variance) that releases under temperature swings or pressure/altitude changes. A separate but related failure mode is the rear glass shattering when the vehicle is driven with the hardtop's flip-up rear glass left in the raised/open position. This is distinct from the already-documented thin-windshield chipping issue, and it is a recurring owner complaint.
Common Symptoms
Rear hardtop glass shatters into small pebbles with no impact
Glass explodes while parked or during normal driving
Loud bang followed by collapsed rear window
More likely during rapid temperature or altitude changes
Failure when driven with the flip-up rear glass left open
How to Fix
Replacement is the only fix for shattered tempered glass — source an OEM Mopar or quality aftermarket rear glass and re-bond/install per the hardtop type (bonded vs. flip-up). When in the warranty window, dealers have frequently replaced spontaneously-shattered glass under warranty with little pushback. Never drive with the flip-up rear glass raised, and avoid slamming the tailgate, to reduce stress-induced failures. Inspect the defrost grid wiring during replacement on heated rear glass.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Replace shattered heated rear glass on an early factory JK hardtop Fitment/availability: 2007-2010 Wrangler JK factory hardtop, heated green/clear solar tint, approximately 42 x 20 inches; measure the opening because later tops may have …
Replace the matching non-deep-tint/alternate-option JL backlite after VIN and glass-code confirmation Fitment/availability: 2018-2020 and 2022-2023 Wrangler JL within the issue range as explicitly cataloged; verify the 2021 VIN and optio…
Replace the matching deep/privacy-tint JL backlite after VIN and glass-code confirmation Fitment/availability: 2018-2023 Wrangler JL within the issue range; supersedes 68282135AF/AJ and related revisions.
Factory soft tops on the Wrangler are a recurring complaint source for excessive wind noise, water leaks, and zipper failures. The plastic front header bow gets hot in summer, bends/warps, and no longer mates cleanly to the windshield gasket, creating both wind noise and water intrusion. Zippers corrode, bind, and tear within months, and even small fabric tears amplify wind noise and grow over time. Base vinyl tops are noisier and leak-prone compared with the premium twill fabric.
For header warp, replace the OEM plastic front header with an aftermarket metal header to restore a proper seal (a commonly cited durable fix). Clean and lubricate zippers with proper zipper lubricant (not WD-40, which attracts grit); replace failed window zippers. Re-seat/replace door surround seals and check top alignment and hardware torque. For degraded or torn fabric, replace the soft top — twill is quieter and seals better than vinyl.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Replace a confirmed bowed or broken factory soft-top header Fitment/availability: 2007-2018 Wrangler JK two-door or Unlimited four-door with factory-grade soft top; distinguish 2018 JK from JL.
Bestop 11206-00 soft-top zipper cleaner and lubricant, 2 oz
OEMBestop 11206-00
Clean and lubricate intact soft-top window zippers after removing grit Fitment/availability: Universal soft-top zipper maintenance for JK/JL; not a repair for separated teeth, torn zipper tape, failed stitching or a broken slider. Fitmen…
Bestop 79846-17 black-twill Replace-A-Top with tinted windows
OEMBestop 79846-17
Replace failed fabric/windows while reusing sound factory bow hardware Fitment/availability: 2010-2018 Wrangler JK two-door only; requires factory frame/hardware and does not fit 2007-2009 JK or JL. Distinguish 2018 JK from JL.
Bestop 79847-17 black-twill Replace-A-Top with tinted windows
OEMBestop 79847-17
Replace failed fabric/windows while reusing sound factory bow hardware Fitment/availability: 2010-2018 Wrangler JK Unlimited four-door only; requires factory original hardware and does not fit two-door, 2007-2009 JK or JL. Fitment/availa…
Mopar black-twill complete soft-top kit for JL two-door
OEMMopar JL two-door twill kit (variant-specific)
Replace a degraded JL two-door top when a complete factory-style hardware kit is needed Fitment/availability: 2018-2025 Wrangler JL two-door; choose exact tinted/clear-window variant and verify model year/VIN.
Mopar 82215146 black-twill complete soft-top kit with tinted windows
OEMMopar 82215146
Replace a degraded JL four-door top when a complete factory-style hardware kit is needed Fitment/availability: 2018-2025 Wrangler JL Unlimited four-door; verify VIN, window tint and all supplied hardware.
The heater core inside the dash-mounted HVAC box develops leaks on high-mileage Wranglers, releasing a sweet coolant smell in the cabin, an oily film that fogs the windshield, and eventually a wet passenger-side carpet with unexplained coolant loss. A common older-Jeep HVAC search due to how labor-intensive the fix is.
Common Symptoms
Sweet coolant smell inside the cabin
Greasy film fogging the windshield
Wet/damp passenger-side carpet
Unexplained coolant loss
Weak or no heat
How to Fix
Replace the heater core — the job requires removing the console, full instrument panel/dash, and steering column to extract the HVAC housing (roughly a full day of labor). As a stopgap to keep driving, the two firewall heater hoses can be joined with a coupler (loses heat/defrost). Pressure-test the cooling system to confirm the core before teardown.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown 4874045 heater core
OEMCrown 4874045
Replace a pressure-test-confirmed leaking or internally failed early-TJ heater core Fitment/availability: 1997-2001 Wrangler TJ with 2.5L or 4.0L and the compatible left-hand-drive HVAC box; not the 2002-2006 core. Confirm hose sizes and…
Replace a pressure-test-confirmed leaking or internally failed late-TJ/LJ heater core Fitment/availability: 2002-2006 Wrangler TJ and Unlimited LJ, left-hand drive; not the 1997-2001 HVAC box and not right-hand drive.
Refill the cooling system after core replacement only on the factory HOAT/MS-9769 branch Fitment/availability: Later TJ/LJ vehicles specified for Chrysler HOAT/G-05; verify the owner's manual/build and existing chemistry.
The HVAC blend-door actuator's plastic internal gears strip with age and cycling, so the motor can no longer drive the temperature blend door. The classic symptom is a repetitive clicking/knocking from behind the dash (often the passenger side) as the actuator hunts against a door it can't move, plus the cabin getting stuck on only-hot or only-cold air regardless of the temperature setting. It is a very common, high-search JK complaint and an inexpensive DIY part, though dash access can be fiddly.
Common Symptoms
Repetitive clicking/knocking behind the dashboard
Cabin stuck on only hot or only cold air
Temperature setting has no effect
Clicking changes/stops when the temp knob is moved
Noise present whenever the ignition is on
How to Fix
Confirm the click tracks with temperature-knob movement and that air temperature won't change. Replace the blend-door actuator (Crown/Mopar 68018109AA for 2011-2018 JK; verify the correct actuator for dual-zone vs single-zone and the specific door). Recalibrate by cycling the temperature controls / battery reset so the HVAC module relearns door travel. Inspect the blend door for binding before installing the new actuator so the replacement doesn't strip prematurely.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Crown 68000470AA A/C and heater door actuator
OEMCrown 68000470AA
Replace the command-tested failed actuator on the early-JK HVAC box after confirming the door moves freely Fitment/availability: 2007-2010 Wrangler JK; verify exact HVAC door position and connector.
Replace the command-tested failed actuator on the later-JK HVAC box after confirming the door moves freely Fitment/availability: 2011-2018 Wrangler JK; retailer notes use at multiple distribution/heater-housing positions, so visually mat…
On JK-generation Wranglers the exhaust manifolds and their gaskets are a well-known weak point, and when the driver-side (bank 2) manifold develops a hairline crack or the gasket at the head or the manifold-to-downpipe joint starts leaking, the leak sits directly upstream of the bank 2 sensor 1 oxygen sensor. Every exhaust pulse pulls a slug of ambient air in through the crack on the low-pressure part of the cycle. That fresh air dilutes the exhaust stream reaching the sensor tip, which flattens the sensor's rich-to-lean and lean-to-rich transitions. The PCM does not see a dead sensor - it sees a sensor whose switch time has stretched past the calibrated threshold - so it stores P0153 rather than a circuit or heater fault. The tell-tale signature of this failure is that the code returns days or weeks after a new bank 2 sensor 1 is installed, sometimes twice, because the sensor was never the defect. Owners on the JK and Jeep enthusiast forums repeatedly describe replacing the sensor, clearing the code, and having P0153 come back on the next few drive cycles until a crack was found in the bank 2 manifold. Because the same mechanism can affect the other side, P0133 (bank 1 sensor 1) frequently appears alongside it, and a pair of slow-response codes on both banks is a strong hint that the problem is exhaust integrity or fuel delivery, not two sensors that failed the same week. Long-term fuel trims on the affected bank usually run positive at idle and pull back toward zero at higher load, which is the classic fingerprint of a leak that gets overwhelmed by exhaust pressure as rpm rises.
Common Symptoms
Check engine light on with P0153, sometimes with P0133
Ticking or puffing noise from the driver-side exhaust manifold when cold that quiets as the engine warms
Code returns within days after a new bank 2 upstream oxygen sensor is installed
Reduced fuel economy
Slight roughness or hesitation at idle
Positive long-term fuel trim on bank 2 at idle that normalizes at higher rpm
How to Fix
Do not start by replacing the sensor. With the engine cold, run it at idle and listen at the driver-side manifold-to-head flange and along the manifold body for a soft ticking or puffing that quiets as the assembly heats and the crack closes - the noise fading with warm-up is itself diagnostic of a crack rather than a gasket. Smoke-test the exhaust from the tailpipe with the cats blocked, or use a propane or carb-cleaner test near the flange while watching short-term fuel trim on a scan tool; a leak will show an immediate trim swing. Inspect the manifold studs, since broken or backed-out fasteners at the end cylinders produce the same leak without any visible crack. Where the manifold is cracked, replace it with a new manifold and gasket set and new studs and nuts; expect at least one seized or snapped stud that has to be drilled and extracted or heli-coiled, which is where most of the labor cost lives. If the manifold is sound and the leak is only at the gasket or the downpipe donut, a gasket and hardware replacement resolves it. Only after the exhaust is sealed should you evaluate the bank 2 sensor 1 signal itself: with the engine at operating temperature, watch the sensor's switching rate in graph mode - a healthy upstream sensor crosses 450 mV several times per second and swings roughly 0.1 V to 0.9 V. If it is still lazy after the leak is fixed, replace it with an OE-grade Mopar or NTK/Denso sensor rather than a generic universal unit, as splice-in universal sensors are a repeat offender for slow-response codes. Clear the code and complete a full drive cycle to confirm the O2 sensor monitor runs and passes.
Chrysler (FCA US, LLC) is recalling certain 2021-2025 Jeep Wrangler, Wrangler 4XE, and Jeep Gladiator vehicles. The electric hydraulic power steering pump wiring may overheat and cause a vehicle fire, even when the vehicle is parked with the ignition in the "Off" position.
Campaign #26V36300004/06/2026
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
Chrysler (FCA US, LLC) is recalling certain 2018-2024 Jeep Wrangler vehicles. The wiring harness for the rearview camera and the center brake light may short circuit, which can disable the rearview camera image and center brake light. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard numbers 111, "Rear Visibility" and 108, "Lamps, Reflective Devices, and Associated Equipment."
Campaign #24V67600012/09/2024
EXTERIOR LIGHTING:TAIL LIGHTS
Chrysler (FCA US, LLC) is recalling certain 2024 Jeep Wrangler vehicles. The vehicles are equipped with incorrect tail lights that may be obstructed by the spare tire. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
How much does it cost to fix common Jeep Wrangler problems?
Repair costs for known Jeep Wrangler issues range from $0 to $5,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Steering Stabilizer Failure/Death Wobble, typically costs $100-$2,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What year Jeep Wrangler is the most reliable?
Reliability varies across model years of the Jeep Wrangler. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 1994-2026 Jeep Wrangler with 78 documented issues documented across 8,181+ owner reports.
What is the 2007-2018 Jeep Wrangler Steering Stabilizer Failure/Death Wobble?
A worn steering stabilizer combined with other suspension wear can contribute to 'death wobble' - a violent shaking of the front end at highway speeds, usually triggered by a bump. While the stabilizer alone rarely causes death wobble, it can mask other issues. Repairs typically run $100-$2,000. Severity: high.
What is the 2007-2016 Jeep Wrangler TIPM (Totally Integrated Power Module) Failure?
The TIPM can develop internal relay failures causing various electrical problems including fuel pump not activating, horn honking randomly, wipers activating on their own, and other erratic electrical behavior. This is a well-known issue across Chrysler vehicles. Repairs typically run $200-$1,200. Severity: high.
What is the 2024-2025 Jeep Wrangler 4xe Engine Sand-Casting Contamination — Loss of Propulsion / Engine Fire (Recall 25V-766 / 78C)?
NHTSA campaign 25V766000 covers certain 2024-2025 Jeep Wrangler 4xe plug-in hybrid vehicles. Casting-sand debris inside the engine can contaminate internal components and cause catastrophic engine failure, an unexpected loss of drive power, or an engine-compartment fire. Owners m… Severity: high.
What is the 2018-2023 Jeep Wrangler Manual transmission clutch pressure plate overheating / fire risk (recall 21V-028 & 23V-116)?
NHTSA campaign 23V116000 covers certain 2018-2023 Jeep Wrangler vehicles equipped with manual transmissions. The clutch intermediate pressure plate may overheat and fracture, potentially cracking the transmission case and expelling heated debris. The debris may contact an ignitio… Severity: high.
What is the 2021-2023 Jeep Wrangler Wrangler 4xe PHEV high-voltage battery fire risk (recall 23V-787, park outside)?
NHTSA campaign 23V787000 covers certain 2021-2023 Jeep Wrangler plug-in hybrid vehicles whose high-voltage battery may fail internally and cause a fire while parked or driving. That campaign was replaced by 24V720000, which was then replaced by current campaign 25V741000. Vehicle… Severity: high.
What is the 2012-2018 Jeep Wrangler TIPM (Totally Integrated Power Module) failure — fuel pump relay & random electrical faults?
The TIPM is the integrated fuse/relay power-distribution module controlling most electrical systems. On many 2007-2018 Chrysler/Jeep vehicles, including the JK Wrangler, the internal fuel-pump relay (and later the other relays) degrades. The first symptom is usually a fuel-pump-r… Repairs typically run $100-$1,200. Severity: high.
What is the 2012-2023 Jeep Wrangler Death Wobble: violent front-end shaking at highway speed (solid front axle)?
Wranglers (JK and JL) with a solid front axle are prone to 'death wobble' — a violent, self-reinforcing side-to-side oscillation of the front-end steering components and steering wheel, typically triggered by hitting a bump, expansion joint or pothole at speeds above ~45-55 mph. Repairs typically run $150-$1,200. Severity: high.
What is the 2026 Jeep Wrangler Insufficient Child-Seat Tether Anchor Welds on the Second-Row Right-Side Seat Frame (Recall 26V224 / 27D)?
Chrysler recalled 32 model year 2026 Jeep Wranglers because the child-seat top-tether anchor welds on the second-row right-side seat frame may be insufficient. Under crash loading the anchor can pull away from the frame, so a top-tethered child restraint would not be properly hel… Repairs typically run $0-$0. Severity: high.
What is the 2024-2025 Jeep Wrangler October 2025 Uconnect OTA Update Bricks Hybrid Control Processor — Sudden Loss of Drive Power (Recall 25V710 / A7C)?
An over-the-air Uconnect update pushed on Friday, October 10, 2025 caused an incomplete communication handshake between the Telematics Box Module (TBM) and the Hybrid Control Processor (HCP). The HCP resets, and the vehicle loses all motive power — gasoline and electric — with no… Repairs typically run $0-$0. Severity: high.
What is the 2024-2025 Jeep Wrangler High-Voltage Battery Internal Failure — Fire While Parked or Driving (Recall 25V741 / 68C, Park Outside & Stop Charging)?
Chrysler recalled 320,068 vehicles — including all 2020-2025 Wrangler 4xe — because the high-voltage traction battery can fail internally and start a fire whether the vehicle is parked or being driven. This is a separate campaign from the 4xe engine sand-casting-contamination rec… Repairs typically run $0-$0. Severity: high.
What is the 2024-2025 Jeep Wrangler Front-End 'Death Wobble' — Violent Steering Oscillation at Highway Speed After a Bump or Bridge Joint?
The solid-front-axle JL Wrangler continues to produce death-wobble reports on brand-new 2024 and 2025 trucks. NHTSA complaints describe the trigger consistently: crossing a bridge expansion joint, road seam or rough patch at roughly 45-75 mph, after which the steering wheel and f… Repairs typically run $150-$900. Severity: high.
What is the 2026 Jeep Wrangler Steel Wheel Walls Too Thin — Wheels Can Crack or Detach (Recall 26V456 / 05D)?
Chrysler recalled 641 model year 2026 Jeep Wrangler and Gladiator vehicles because the wall thickness of the factory steel wheels is below specification. The thin walls can crack and, in the worst case, allow the wheel to separate from the vehicle, causing loss of control. This a… Repairs typically run $0-$0. Severity: high.
What is the 2021-2025 Jeep Wrangler Electric-Hydraulic Power Steering Pump Wiring Overheat — Fire Risk & Loss of Assist (2026 Recall)?
NHTSA campaign 26V363000 covers certain 2021-2025 Jeep Wrangler, Wrangler 4xe and Gladiator vehicles. High resistance at the electric-hydraulic power steering pump electrical connection may overheat combustible material and cause a vehicle fire, including while the vehicle is par… Severity: high.
What is the 2012-2017 Jeep Wrangler 3.6L Pentastar V6 left cylinder head failure / engine tick (early build)?
Early 3.6L Pentastar V6 Wranglers (especially 2012 and early-2013 builds) suffered a left (driver-side) cylinder head defect where the head would overheat and damage a valve seat/guide, causing low compression, a persistent ticking/tapping noise (often described as a 'left bank t… Repairs typically run $1,000-$4,500. Severity: high.
What is the 1997-2006 Jeep Wrangler In-Tank Fuel Pump Module Failure — Whine, Hard Start & No-Start?
The in-tank fuel pump module (pump, sending unit, and level float) wears out on high-mileage TJ Wranglers, producing a loud whine from the tank, hard starting, stalling, and eventual crank-no-start as fuel pressure drops. A top-searched TJ fuel-system failure, sometimes accompani… Repairs typically run $200-$550. Severity: high.
What is the 2000-2006 Jeep Wrangler Clock Spring Failure Causing Airbag Light, Horn, and Cruise Control Loss?
A common TJ/LJ Wrangler failure is the steering column clock spring wearing out internally, which breaks electrical continuity to the driver airbag, horn, and cruise-control switches. Owners typically report an illuminated airbag light along with an inoperative horn and cruise co… Repairs typically run $250-$700. Severity: high.
What is the 2018 Jeep Wrangler Cruise Control May Not Disengage — Wiring Short Circuit (Recall 18V332000)?
The 2018 Jeep Wrangler is included in FCA US recall 18V332000, which covers a defect that can prevent the cruise control system from shutting off. NHTSA's record states that if a short circuit occurs in the vehicle's wiring while cruise control is engaged, the driver may not be a… Severity: high.
What is the 2012-2020 Jeep Wrangler 3.6L Pentastar Rocker Arm / Lifter Needle-Bearing Failure — Valvetrain Tick, Misfire & Cam Damage?
The 3.6L Pentastar V6 used in JK (2012-2018) and JL (2018+) Wranglers suffers a documented valvetrain failure separate from the engine's oil-consumption problem. The needle roller bearings inside the rocker arms wear prematurely, loosen, and can drop out, shifting the rocker arm… Repairs typically run $1,300-$4,000. Severity: high.
What is the 2000-2006 Jeep Wrangler Front Frame Rust and Control Arm Bracket Corrosion?
Rust-through of the TJ frame, especially near the lower control arm mounts, skid plate area, and rear trailing arm sections, is one of the most serious age-related Wrangler problems. In rust-belt states, owners report perforation severe enough to affect suspension mounting integr… Repairs typically run $800-$5,000. Severity: high.
What is the 2021-2025 Jeep Wrangler 4xe Repeated 12V Battery Drain / Complete Electrical Shutdown?
Wrangler 4xe owners report repeated dead 12V auxiliary batteries and, in some cases, complete electrical shutdowns. Several owners found the included Level 1 charger drains the 12V battery after the high-voltage pack reaches 100%, leaving the vehicle unresponsive within days. Bey… Repairs typically run $0-$400. Severity: high.
