According to Au7o's analysis of 25,020+ owner reports, the 2014 Chrysler 300 has 17 documented known issues, with 9 rated critical. The most serious are TIPM Electrical Failures ($200-$1,200 repair), Fuel Pump Relay Failure (TIPM-Related) ($200-$1,200 repair), HEMI 5.7L MDS Lifter and Camshaft Failure ($2,000-$6,000 repair), Alternator Failure (Multiple Recalls) ($0-$800 repair), Water Pump Failure and Cooling Leaks ($500-$900 repair), ABS Module Internal Failure ($300-$1,200 repair), Pentastar Cylinder Head Failure ($2,500-$4,500 repair), Starter Motor Failure ($300-$700 repair) and Monostable Shifter Rollaway Warning ($0-$0 repair). The most commonly reported issue is TIPM Electrical Failures with 3,200 owner reports. Across all issues with published estimates, repair costs range from $20 to $6,000. DIY maintenance guides at .
Chrysler (FCA US, LLC) is recalling certain 2023 Chrysler 300, Dodge Charger, and Dodge Challenger vehicles. The parking brake may be improperly adjusted, which can result in a vehicle roll away. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 135, "Light Vehicle Brake Systems."
Campaign #24V11200015/02/2024
VISIBILITY:WINDSHIELD
Chrysler (FCA US, LLC) is recalling certain 2020-2021 Dodge Challenger, Dodge Charger, and Chrysler 300 vehicles. During manufacturing, the windshield may not have been properly bonded to the vehicle, allowing it to detach in a crash. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 212, "Windshield Mounting."
Campaign #21V51600008/07/2021
AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR
Chrysler (FCA US, LLC) (Stellantis) is recalling certain 2018-2021 Dodge Charger and Chrysler 300 vehicles. The right and left side curtain air bag inflators may rupture due to a manufacturing defect.
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According to Au7o's analysis of 25,020+ owner reports, the 2014 Chrysler 300 has 17 documented issues. The most frequently reported are: TIPM Electrical Failures, Fuel Pump Relay Failure (TIPM-Related), HEMI 5.7L MDS Lifter and Camshaft Failure. Of these, 9 are rated critical and should be addressed promptly.
Is the Chrysler 300 reliable?
The 2014 Chrysler 300 has 17 known issues documented across 25,020+ owner reports. 9 issues are rated critical: TIPM Electrical Failures and Fuel Pump Relay Failure (TIPM-Related) and HEMI 5.7L MDS Lifter and Camshaft Failure and Alternator Failure (Multiple Recalls) and Water Pump Failure and Cooling Leaks and ABS Module Internal Failure and Pentastar Cylinder Head Failure and Starter Motor Failure and Monostable Shifter Rollaway Warning. 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.
How much does it cost to fix common Chrysler 300 problems?
Repair costs for known Chrysler 300 issues range from $0 to $6,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, TIPM Electrical Failures, typically costs $200-$1,200 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2011-2016 Chrysler 300 TIPM Electrical Failures?
The TIPM main fuse and relay box circuit board traces blow from current spikes, shorts, or corrosion. Water intrusion common. Causes random electrical issues affecting fuel pump, lights, wipers, horn, windows, and safety systems. Repairs typically run $200-$1,200. Severity: high.
What is the 2011-2016 Chrysler 300 Fuel Pump Relay Failure (TIPM-Related)?
Fuel pump relay inside TIPM fails, preventing fuel pump activation. Vehicle has full electrical power but won't start due to no fuel delivery. Related to broader TIPM issue, specifically affects ASD/Fuel Pump relay circuits. Repairs typically run $200-$1,200. Severity: high.
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
Control Arm Bushing Premature Wear
20K-40K
Rear Differential Whine and Bearing Failure
40K-60K
ZF 8-Speed Transmission Harsh Shifting
45K-150K
038K75K113K150K mi
Community reported
3,200 owners
On the 2011-2016 Chrysler 300, the TIPM main fuse and relay box circuit board traces blow from current spikes, shorts, or corrosion. Water intrusion common. Causes random electrical issues affecting fuel pump, lights, wipers, horn, windows, and safety systems.
TIPM replacement or professional rebuild. Specialty companies offer rebuild services for $200-400 with warranty. OEM replacement from dealer $700-1,200 plus programming. Disconnect battery for 10 minutes to attempt temporary reset.
Owner tips & cautions
TipUse TIPM rebuild specialists like Circuit Board Medics or MAKS TIPM
High ConfidenceVerified3,200 reportsLast reported by owners May 2023Reviewed Feb 2026
Community reported
2,100 owners
On the 2011-2014 Chrysler 300, both 3.6L and 5.7L engines with 160, 180, or 220 amp alternators prone to sudden failure. Voltage regulator in PCM can fail. Internal diode failures cause battery drain, fires, and loss of power while driving.
Alternator replacement with updated unit per recall. Free replacement under recall for affected vehicles. Check PCM voltage regulator function. Verify alternator connections properly seated.
Owner tips & cautions
WarningCheck if your VIN affected by recalls at safercar.gov
High ConfidenceVerified2,100 reportsLast reported by owners Sep 2021Reviewed Feb 2026
Community reported
890 owners
On the 2011-2023 Chrysler 300, starter motors fail prematurely or intermittently. Grinding noise during starting indicates worn starter gear. Electrical issues including corroded battery terminals, failed neutral safety switch, and bad starter relay contribute to no-start.
Common Symptoms
Grinding noise when trying to start
Clicking sound but engine doesn't crank
No sound when turning key (silent)
Intermittent starting - works sometimes, fails others
How to Fix
Replace starter motor with updated unit. Before replacement, clean battery terminals and check battery voltage (12.4V+). Test neutral safety switch. Check starter relay and all wiring connections for corrosion.
Owner tips & cautions
TipClean battery terminals first (cheapest troubleshooting)
Medium ConfidenceVerified890 reportsLast reported by owners Feb 2023Reviewed Feb 2026
Community reported
1,550 owners
On the 2011-2023 Chrysler 300, power window regulators and motors fail frequently, particularly rear doors. Cable in regulator breaks or motor burns out. Window stuck in down or up position. Motor and regulator sold as assembly, cannot be separated.
Replace window motor and regulator assembly. TSB #08-011-07 REV. A addresses front window issues requiring door module replacement. Check fuse first. Verify window switches functioning before replacing regulator.
Owner tips & cautions
TipOEM regulators recommended - aftermarket units fail quickly
High ConfidenceVerified1,550 reportsLast reported by owners Jun 2023Reviewed Feb 2026
Community reported
2,400 owners
On the 2011-2023 Chrysler 300 5.7L HEMI V8, the 5.7L HEMI V8 suffers from MDS lifter design defect where needle bearings are undersized. Lifters can be starved of oil during idle, causing seizure and catastrophic camshaft wear leading to engine failure.
Replace all lifters, camshaft, and rocker arms as assembly. Use only OEM or high-quality lifters. Some owners disable MDS system. Use only SAE 5W-20 oil and maintain strict 3,000-5,000 mile oil change intervals.
Owner tips & cautions
TipDisable MDS system via tuner or MDS delete kit
TipUse synthetic oil, change every 3,000 miles maximum
WarningAvoid 2011-2014 models; post-Feb 2015 have improved lifters
High ConfidenceVerified2,400 reportsLast reported by owners Aug 2023Reviewed Feb 2026
Community reported
950 owners
On the 2011-2016 Chrysler 300 3.6L V6, left cylinder head on early Pentastar engines suffers valve seat failure in cylinder #2. Valve seats overheat and drop out of aluminum head causing catastrophic misfires and potential engine damage. Design flaw later addressed.
Complete cylinder head replacement required (left/driver's side). Cannot be repaired - must replace entire head with updated design. Some cases require both heads preventatively. Full coolant flush and thermostat replacement recommended.
High ConfidenceVerified950 reportsLast reported by owners Nov 2022Reviewed Feb 2026
Community reported
1,800 owners
On the 2011-2023 Chrysler 300 3.6L V6, the plastic oil filter housing develops cracks and gasket failures due to heat cycling. Chrysler discontinued original plastic part but never issued recall despite widespread problem.
Replace with Dorman aluminum aftermarket housing (recommended by mechanics). OEM replacement is still plastic and will fail again. Complete coolant and oil system flush recommended.
High ConfidenceVerified1,800 reportsLast reported by owners Jun 2023Reviewed Feb 2026
Community reported
350 owners
On the 2005-2023 Chrysler 300 5.7L HEMI V8, the 5.7L HEMI is notorious for exhaust manifold bolts breaking, especially on the passenger side. Thermal cycling causes bolts to become brittle and snap. Creates a ticking noise at cold startup that partially diminishes as engine warms but never fully goes away. Broken bolts can be extremely difficult to extract if snapped flush with the cylinder head.
Noise diminishes as engine warms but doesn't fully disappear
Visible exhaust soot around manifold flanges
Failed emissions inspection
Exhaust smell in engine bay
How to Fix
Extract broken bolts using ProMAXX drill template tool kit (PMXA200PROP) to safely extract without damaging cylinder head. Replace with upgraded Grade 8 double-ended studs and nuts instead of bolts. Apply anti-seize compound on new hardware. Consider Hooker Blackheart stainless replacement manifolds for a permanent upgrade on high-mileage vehicles.
Owner tips & cautions
TipReplace bolts with Mopar double-ended studs (6509863AA/6510141AA) and Grade 8 nuts instead of bolts - far more durable solution
TipProMAXX broken bolt repair kit (PMXA200PROP) is the safest way to extract broken bolts without damaging the cylinder head
TipUse Felpro exhaust manifold gasket set MS96692 (2005-2008) when replacing - always install new gaskets
WarningAlways apply anti-seize compound on new hardware to prevent future seizure from thermal cycling
High Confidence350 reportsLast reported by owners Nov 2025Reviewed Feb 2026
Community reported
2,400 owners
On the 2011-2016 Chrysler 300, fuel pump relay inside TIPM fails, preventing fuel pump activation. Vehicle has full electrical power but won't start due to no fuel delivery. Related to broader TIPM issue, specifically affects ASD/Fuel Pump relay circuits.
TIPM replacement or professional rebuild focusing on fuel pump relay circuits. Temporary fix: tap on TIPM while starting (may restore connection). Long-term requires TIPM replacement ($700-1,200) or rebuild ($200-400).
Owner tips & cautions
TipTIPM rebuild specialists familiar with fuel pump relay failures
High ConfidenceVerified2,400 reportsLast reported by owners Apr 2023Reviewed Feb 2026
Community reported
2,800 owners
On the 2011-2023 Chrysler 300, evaporative emission control system develops small leaks triggering P0456 code. Most commonly failed gas cap, chaffed EVAP purge pipe harness, or failed purge solenoid. Triggers check engine light and prevents emissions testing pass.
Start with gas cap replacement ($20-40). If code returns, smoke test EVAP system to locate leak. Common fixes: replace purge solenoid, repair chaffed wiring harness, or replace cracked EVAP hoses.
High ConfidenceVerified2,800 reportsLast reported by owners Sep 2023Reviewed Feb 2026
Community reported
450 owners
On the 2012-2014 Chrysler 300, vehicles with monostable electronic gear selector may not adequately warn driver when door opened and vehicle not in PARK. Shifter returns to center after each shift, making gear selection unclear. Led to rollaway incidents subject to NHTSA recall.
Common Symptoms
Vehicle rolls away after driver exits
Chime or warning may not sound when door opened in Drive
Confusion about which gear selected
Vehicle not in Park despite shifter appearing neutral
How to Fix
Dealer software update per NHTSA recall S27. Update improves warning chimes and messages when door opened out of Park. Always verify Park on dashboard display before exiting. Apply parking brake as backup.
Owner tips & cautions
WarningGet recall performed immediately, always use parking brake
High ConfidenceVerified450 reportsLast reported by owners Jun 2021Reviewed Feb 2026
Community reported
1,400 owners
On the 2012-2023 Chrysler 300, the ZF 8-speed automatic develops harsh shifting, especially in 2nd gear. Valve body is primary failure point. Cold shifting particularly problematic. Chrysler states "sealed for life" but failures occur before 150,000 miles.
Dealer must replace transmission valve body under warranty if applicable. Ensure TCM updated to latest software. Perform Quicklearn procedure after work. Use only ZF-approved fluid.
Owner tips & cautions
TipChange fluid at 60,000 miles with ZF-approved fluid despite "sealed for life" claim
High ConfidenceVerified1,400 reportsLast reported by owners Apr 2023Reviewed Feb 2026
Community reported
1,650 owners
On the 2011-2023 Chrysler 300, water pumps fail prematurely due to bearing and seal wear. Air pockets frequently form in cooling system after repairs. The 300 is difficult to properly bleed air from cooling system.
Coolant leak from front of engine or below water pump
Engine overheating or running hot
Temperature gauge fluctuating
Whining or grinding noise from water pump
How to Fix
Water pump replacement with new gaskets. Replace thermostat simultaneously per TSB. Complete coolant flush and proper bleeding essential. Use purge valve in front of upper intake manifold.
Owner tips & cautions
TipAlways replace thermostat when replacing water pump
High ConfidenceVerified1,650 reportsLast reported by owners Jul 2023Reviewed Feb 2026
Community reported
1,300 owners
On the 2011-2023 Chrysler 300, aBS control module suffers internal failures due to short circuits in main circuit board. Prevents proper ABS operation and stores fault codes. While regular braking functions, vehicle loses anti-lock capability, traction control, and stability control.
Common Symptoms
ABS warning light constantly illuminated
BAS warning light
Traction control warning
U0121 code (lost communication with ABS)
No ABS function during hard braking
How to Fix
ABS module replacement or professional rebuild service. Check all wheel speed sensors and wiring before replacement. Many specialty shops offer rebuild for $300-500 with warranty. OEM module requires programming to VIN.
Owner tips & cautions
TipTry ABS module rebuild services before buying new
High ConfidenceVerified1,300 reportsLast reported by owners Dec 2022Reviewed Feb 2026
Community reported
1,100 owners
On the 2011-2023 Chrysler 300, oEM control arm bushings fail prematurely around 20,000-40,000 miles instead of typical 100,000+ lifespan. Bushings press-fitted into arms and cannot be replaced separately on most applications, requiring full control arm replacement.
Replace lower/upper control arms as complete assemblies. Aftermarket polyurethane bushings (Prothane, Energy Suspension) offer longer life but harsher ride. Alignment required after replacement.
High ConfidenceVerified1,100 reportsLast reported by owners Mar 2023Reviewed Feb 2026
Community reported
680 owners
On the 2011-2023 Chrysler 300, rear differential develops whining from failed pinion bearing or ring/pinion wear. LX platform differentials have inherent whine, but excessive noise indicates bearing failure. Front differentials on AWD fail at 40,000-60,000 miles.
Common Symptoms
Whining noise from rear during acceleration
Humming or roaring that increases with speed
Clunking during low-speed turns
Vibration from rear axle area
Dark fluid with metal shavings
How to Fix
Differential rebuild or replacement for severe cases. Drain differential fluid and inspect for metal shavings. Change fluid every 30,000-40,000 miles. Use proper limited-slip fluid if equipped. Pinion bearing replacement if caught early.
Owner tips & cautions
TipChange differential fluid at 30K-40K intervals (ignore longer factory interval)
Medium ConfidenceVerified680 reportsLast reported by owners Oct 2022Reviewed Feb 2026
On the 2005-2023 Chrysler 300, the Chrysler 300 uses Chrysler's proprietary natural-vacuum leak detection hardware instead of a conventional pressure-based leak detection pump. On 2005-2006 cars this is the NVLD (Natural Vacuum Leak Detection) valve/solenoid; from 2007 onward it is the ESIM (Evaporative System Integrity Monitor), a small spring-and-diaphragm switch mounted on or next to the charcoal/vapor canister on the left underbody ahead of the fuel tank. Both work the same way: as the sealed EVAP system heats and cools, natural pressure/vacuum changes trip an internal switch the PCM reads to confirm the system is sealed. The diaphragm seal inside the NVLD/ESIM is a well-documented high-failure item — it stiffens, sticks, or loses its seal with age, so the PCM can no longer verify integrity and falsely reports a leak. The result is a check-engine light with P0456 (small leak, ~0.020 in.), P0455 (large leak), or P0457 (interpreted as loose/missing cap), even when the fuel system is actually sealed. Because the code wording points at the gas cap, this is very commonly misdiagnosed: owners and shops replace the cap (and often the purge valve and canister) repeatedly before discovering the NVLD/ESIM itself is the culprit. One 2012 300 SRT owner reported eight dealer visits — the ESIM and its seal replaced twice, plus a new filler neck, purge valve, and charcoal canister — before the leak code was resolved. The fault is an emissions/MIL issue only: it does not affect drivability or engine longevity, but it will fail an emissions/smog inspection and on some model years can disable remote start until cleared. A faint fuel-vapor smell is occasionally reported when an actual leak is present.
Check engine light / MIL on with no drivability change
Stored EVAP leak codes P0455, P0456, and/or P0457
Dashboard or message-center warning that the gas cap is loose/off even when it is tight
Repeat check-engine light after replacing the gas cap
Failed state emissions / smog inspection
Remote start disabled until the code is cleared (some model years)
Occasional faint fuel-vapor smell near the tank/filler when an actual leak is present
How to Fix
Always start with the cheapest checks: tighten the fuel cap fully (listen for clicks), inspect the cap's O-ring seal, and replace a cracked/old cap with a genuine Mopar cap, then clear the code and drive several drive cycles. If the code returns, have a shop perform an EVAP smoke test — but note the small-leak verification monitor can fail even when a smoke test passes (some hairline EVAP-line cracks only open under vacuum, sealing under the positive pressure of a smoke machine). Inspect the EVAP lines and the purge valve/solenoid for cracks. If the cap, lines, and purge valve are good, replace the NVLD valve (2005-2006) or the ESIM (2007+); the ESIM is the common Mopar service part (e.g., P/N 4861959AD), typically about $40-$60 OEM ($20-$50 aftermarket), and unbolts from the canister with a few hand tools — a DIY-friendly job. On early cars where the NVLD/ESIM is integrated and sold only with the charcoal canister assembly, expect a higher parts cost. After replacement, clear the codes and complete the EVAP drive-cycle/monitor before re-testing for emissions. Total at a shop generally runs from roughly $150 (ESIM swap with labor) up to the $417-$476 range if a full vapor/charcoal canister assembly is needed.
Chrysler (FCA US LLC) is recalling certain 2019 Dodge Challenger and Charger and Chrysler 300 vehicles. The instrument cluster may not properly illuminate driver warnings. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 101, "Control and Displays."
Campaign #19V20300014/03/2019
TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
Chrysler (FCA US LLC) is recalling certain 2022 Dodge Challenger, Dodge Charger, and Chrysler 300 vehicles. The Tire Pressure Monitoring System (TPMS) sensor battery may fail prematurely and cause the sensor to become inoperative. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 138, "Tire Pressure Monitoring Systems."
What is the 2011-2023 Chrysler 300 HEMI 5.7L MDS Lifter and Camshaft Failure?
The 5.7L HEMI V8 suffers from MDS lifter design defect where needle bearings are undersized. Lifters can be starved of oil during idle, causing seizure and catastrophic camshaft wear leading to engine failure. Repairs typically run $2,000-$6,000. Severity: high.
What is the 2011-2014 Chrysler 300 Alternator Failure (Multiple Recalls)?
Both 3.6L and 5.7L engines with 160, 180, or 220 amp alternators prone to sudden failure. Voltage regulator in PCM can fail. Internal diode failures cause battery drain, fires, and loss of power while driving. Repairs typically run $0-$800. Severity: high.
What is the 2011-2023 Chrysler 300 Water Pump Failure and Cooling Leaks?
Water pumps fail prematurely due to bearing and seal wear. Air pockets frequently form in cooling system after repairs. The 300 is difficult to properly bleed air from cooling system. Repairs typically run $500-$900. Severity: high.
What is the 2011-2023 Chrysler 300 ABS Module Internal Failure?
ABS control module suffers internal failures due to short circuits in main circuit board. Prevents proper ABS operation and stores fault codes. While regular braking functions, vehicle loses anti-lock capability, traction control, and stability control. Repairs typically run $300-$1,200. Severity: high.
What is the 2011-2016 Chrysler 300 Pentastar Cylinder Head Failure?
Left cylinder head on early Pentastar engines suffers valve seat failure in cylinder #2. Valve seats overheat and drop out of aluminum head causing catastrophic misfires and potential engine damage. Design flaw later addressed. Repairs typically run $2,500-$4,500. Severity: high.
What is the 2011-2023 Chrysler 300 Starter Motor Failure?
Starter motors fail prematurely or intermittently. Grinding noise during starting indicates worn starter gear. Electrical issues including corroded battery terminals, failed neutral safety switch, and bad starter relay contribute to no-start. Repairs typically run $300-$700. Severity: high.
What is the 2012-2014 Chrysler 300 Monostable Shifter Rollaway Warning?
Vehicles with monostable electronic gear selector may not adequately warn driver when door opened and vehicle not in PARK. Shifter returns to center after each shift, making gear selection unclear. Led to rollaway incidents subject to NHTSA recall. Repairs typically run $0-$0. Severity: high.
What is the 2011-2023 Chrysler 300 Pentastar 3.6L Oil Filter Housing Leak?
The plastic oil filter housing develops cracks and gasket failures due to heat cycling. Chrysler discontinued original plastic part but never issued recall despite widespread problem. Repairs typically run $400-$900. Severity: medium.
What is the 2012-2023 Chrysler 300 ZF 8-Speed Transmission Harsh Shifting?
The ZF 8-speed automatic develops harsh shifting, especially in 2nd gear. Valve body is primary failure point. Cold shifting particularly problematic. Chrysler states "sealed for life" but failures occur before 150,000 miles. Repairs typically run $800-$2,500. Severity: medium.
What is the 2011-2023 Chrysler 300 Control Arm Bushing Premature Wear?
OEM control arm bushings fail prematurely around 20,000-40,000 miles instead of typical 100,000+ lifespan. Bushings press-fitted into arms and cannot be replaced separately on most applications, requiring full control arm replacement. Repairs typically run $280-$800. Severity: medium.
What is the 2011-2023 Chrysler 300 Rear Differential Whine and Bearing Failure?
Rear differential develops whining from failed pinion bearing or ring/pinion wear. LX platform differentials have inherent whine, but excessive noise indicates bearing failure. Front differentials on AWD fail at 40,000-60,000 miles. Repairs typically run $600-$2,500. Severity: medium.
What is the 2005-2023 Chrysler 300 5.7L HEMI Exhaust Manifold Bolt Failure?
The 5.7L HEMI is notorious for exhaust manifold bolts breaking, especially on the passenger side. Thermal cycling causes bolts to become brittle and snap. Creates a ticking noise at cold startup that partially diminishes as engine warms but never fully goes away. Broken bolts can… Repairs typically run $400-$1,500. Severity: medium.
What is the 2011-2023 Chrysler 300 EVAP System Small Leak (P0456)?
Evaporative emission control system develops small leaks triggering P0456 code. Most commonly failed gas cap, chaffed EVAP purge pipe harness, or failed purge solenoid. Triggers check engine light and prevents emissions testing pass. Repairs typically run $20-$500. Severity: low.
What is the 2011-2023 Chrysler 300 Window Regulator and Motor Failure?
Power window regulators and motors fail frequently, particularly rear doors. Cable in regulator breaks or motor burns out. Window stuck in down or up position. Motor and regulator sold as assembly, cannot be separated. Repairs typically run $250-$600. Severity: low.
What is the 2005-2023 Chrysler 300 EVAP Leak Detection (NVLD/ESIM) Failure Triggers P0455/P0456 — Often Misdiagnosed as a Bad Gas Cap?
The Chrysler 300 uses Chrysler's proprietary natural-vacuum leak detection hardware instead of a conventional pressure-based leak detection pump. On 2005-2006 cars this is the NVLD (Natural Vacuum Leak Detection) valve/solenoid; from 2007 onward it is the ESIM (Evaporative System… Repairs typically run $40-$476. Severity: low.
