According to Au7o's analysis of 15,310+ owner reports, the 2013-2025 Mazda CX-5 has 29 documented known issues, with 8 rated critical. The most serious are Defective Fuel Pump (Denso Recall), Excessive Engine Oil Consumption, Sticking Brake Calipers and Premature Wear, SKYACTIV-D 2.2 Diesel Engine Oil Dilution from Interrupted DPF Regeneration ($120-$4,500 repair), SKYACTIV-D 2.2 Intake Shutter Valve and EGR Carbon Deposit Buildup (Diesel Recall) ($0-$1,500 repair), Side Curtain Air Bag Silicone Coating Delamination / Gas Leak on Deployment (Recall 18V426) ($0-$0 repair), SKYACTIV-G 2.5T Cracked Cylinder Head Coolant Leak ($2,300-$9,500 repair) and Cylinder Deactivation Rocker Arm Dislodgement / Engine Stall (Recall 19V-497) ($0-$3,000 repair). The most commonly reported issue is Defective Fuel Pump (Denso Recall) with 3,200 owner reports. Across all issues with published estimates, repair costs range from $100 to $9,500. at .
According to Au7o's analysis of 15,310+ owner reports, the 2013-2025 Mazda CX-5 has 29 documented issues. The most frequently reported are: Defective Fuel Pump (Denso Recall), Excessive Engine Oil Consumption, Sticking Brake Calipers and Premature Wear. Of these, 8 are rated critical and should be addressed promptly.
Is the Mazda CX-5 reliable?
The 2013-2025 Mazda CX-5 has 29 known issues documented across 15,310+ owner reports. 8 issues are rated critical: Defective Fuel Pump (Denso Recall) and Excessive Engine Oil Consumption and Sticking Brake Calipers and Premature Wear and SKYACTIV-D 2.2 Diesel Engine Oil Dilution from Interrupted DPF Regeneration and SKYACTIV-D 2.2 Intake Shutter Valve and EGR Carbon Deposit Buildup (Diesel Recall) and Side Curtain Air Bag Silicone Coating Delamination / Gas Leak on Deployment (Recall 18V426) and SKYACTIV-G 2.5T Cracked Cylinder Head Coolant Leak and Cylinder Deactivation Rocker Arm Dislodgement / Engine Stall (Recall 19V-497). 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 Mazda CX-5 problems?
Repair costs for known Mazda CX-5 issues range from $0 to $9,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What year Mazda CX-5 is the most reliable?
Reliability varies across model years of the Mazda CX-5. 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 2013-2025 Mazda CX-5 with 29 documented issues documented across 15,310+ owner reports.
What is the 2019-2021 Mazda CX-5 Defective Fuel Pump (Denso Recall)?
Low-pressure fuel pump impellers can deform, causing pump failure and engine stalling without warning. Part of massive global recall affecting 19+ million vehicles across multiple manufacturers. 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
Carbon Buildup on Intake Valves (Skyactiv)
5K-10K
Premature Wheel Bearing Failure
11K-36K
Sticking Brake Calipers and Premature Wear
12K-40K
013K25K38K50K mi
Community reported
1,250 owners
Defective valve stem seals allow oil to leak into combustion chambers, causing excessive oil consumption and potential catastrophic engine failure if oil levels drop critically low. Issue primarily affects 2013-2014 models with resurgence in 2021-2022.
Common Symptoms
Frequent low oil warnings and check engine lights
Oil level drops significantly between changes
Blue smoke from exhaust
Risk of engine damage if oil level gets too low
How to Fix
Replace valve stem seals; in severe cases, engine rebuild or replacement may be necessary. Monitor oil level frequently and top up as needed.
Owner tips & cautions
TipCheck oil level every 500 miles if affected
TipDocument oil consumption for warranty claim
TipContact Mazda for warranty coverage under TSB
WarningDo not ignore low oil warnings - engine failure can occur quickly
High ConfidenceVerified1,250 owner reportsLast reported by owners Oct 2023Reviewed Feb 2026
The 2.2 SKYACTIV-D uses post-injection of diesel into the cylinder to raise exhaust temperature for diesel particulate filter regeneration. Fuel that is not burned washes past the rings into the sump. If the engine is shut off mid-regeneration - the normal outcome of short urban trips - the cycle never completes, regenerations retry more frequently, and each attempt adds more fuel to the oil. Owners report the dipstick rising well above the maximum mark and sump levels reaching the X/overfill mark in as little as 6,000 km, with some engines regenerating every 240-400 km. Diluted oil loses viscosity and can trigger low oil pressure warnings; in the worst cases dilution feeds a runaway condition. This is specific to the Denso-ECU SKYACTIV-D and is not a SKYACTIV-G gasoline failure - the diesel was widely sold in Europe and Australia and only briefly offered in the US.
Common Symptoms
Engine oil level rising above the MAX mark on the dipstick
Strong diesel smell in the engine oil
Low oil pressure warning light
Very frequent DPF regeneration cycles (every 200-400 km)
Elevated idle speed and cooling fan running after stopping
Loss of power / limp mode with DPF warning
How to Fix
There is no universal free remedy in most markets, though Mazda has released PCM calibration updates that alter the regeneration strategy - ask your dealer whether an updated diesel PCM calibration applies to your VIN. Operationally: never shut the engine off during an active regeneration (watch for elevated idle, cooling fan running, no auto stop, instant fuel economy collapse), give the car a sustained highway run regularly, use high-detergent branded diesel, and check the oil level at every fill. Treat a dipstick above MAX as a fault, not an overfill - change the oil immediately with the correct low-SAPS spec. Repeatedly ignoring rising oil level risks bearing damage or an uncontrolled overspeed event.
On the 2.5L NA engine equipped with cylinder deactivation, faulty PCM software could mismanage the oil-pressure transition of the switchable hydraulic lash adjusters (HLAs) when switching between 2-cylinder and 4-cylinder modes. This let an intake rocker arm slip off the valve tip on cylinder 1 or 4, causing instant misfire, power loss, illuminated MIL, and in some cases a stall with no restart while driving. Mazda recalled ~262,000 vehicles (incl. 2018-2019 CX-5) under NHTSA 19V-497 / Mazda recall 3719F. Owners commonly report a cold-start valve-train tick from cylinder 4; HLAs can stay damaged because the recall only flashes software and does not inspect the rockers.
Common Symptoms
Cold-start ticking/tapping from valve train (cylinder 4)
Engine misfire and rough idle
Sudden power loss while driving
Stall that will not restart
Check engine light
How to Fix
Have the free recall (NHTSA 19V-497) performed — dealers reprogram the PCM with corrected hydraulic-valve-adjustment logic. If a ticking noise or P0300-series misfire persists after the flash, the HLA(s) and rocker arm on the affected cylinder (often #4) are already damaged and must be replaced; mechanics recommend inspecting/replacing all lash adjusters and checking the camshaft lobe for wear. Out-of-warranty valve-train repair typically exceeds $1,500-$3,000+ if the head must come off.
Direct-injection Skyactiv engines accumulate carbon deposits on intake valves due to oil vapors from the PCV system. Without port injection to clean valves, carbon can fuse to valve surfaces over time, typically appearing around 65,000+ miles.
Common Symptoms
Rough idle and engine misfires
Reduced power and poor fuel economy
Check engine light with misfire codes
Symptoms typically appear around 65,000+ miles
How to Fix
Walnut blasting intake valves to remove carbon deposits. Preventive maintenance using fuel additives (Techron, Sea Foam, Lucas) every 5,000-10,000 miles can help reduce buildup.
Owner tips & cautions
TipWalnut blasting every 60,000-80,000 miles as preventive maintenance
High ConfidenceVerified2,100 owner reportsLast reported by owners Dec 2023Reviewed Feb 2026
Community reported
740 owners
MAF sensor becomes contaminated with dirt or suffers water damage, providing incorrect air intake readings. Causes vehicle to enter "limp mode" with severe performance degradation.
Common Symptoms
Loss of power, vehicle enters limp mode
Engine hesitation and jerky acceleration
Check engine light with codes P0100-P0104
Erratic idling and misfires
Vehicle may stall and not restart
How to Fix
Clean MAF sensor with CRC MAF cleaner (#05110) or replace sensor. Do not use brake cleaner or carburetor cleaner as they can damage the sensor.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
CRC 05110 Mass Air Flow Sensor Cleaner, 11-ounce aerosol
OEMCRC 05110
Clean a contaminated MAF sensing element after diagnosis Fitment/availability: Live direct product page identifies CRC 05110 MAF cleaner. Use only on a removed MAF according to the label, never substitute brake/carburetor cleaner, never …
High ConfidenceVerified740 owner reportsLast reported by owners Jul 2023Reviewed Feb 2026
Community reported
430 owners
Exhaust manifold gasket becomes deformed from impact (speed bumps, road debris), causing exhaust leaks. Can also develop manifold cracks over time from heat cycling.
Common Symptoms
Ticking or hissing noise from engine bay
Smell of exhaust fumes in cabin or outside
Check engine light with oxygen sensor codes
Reduced engine performance
How to Fix
Replace exhaust manifold gasket or full manifold if cracked. Use high-quality gasket material rated for high heat.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mazda PE17-13-460 exhaust-manifold gasket
OEMMazda PE17-13-460
Reseal a confirmed manifold-to-head leak on the 2013-2016 CX-5 2.0L PE-engine branch Fitment/availability: Live direct page identifies PE17-13-460, ships in 1-2 business days and Add to Cart. Mazda service information assigns PE17/PEB4 t…
Reseal a confirmed manifold-to-head leak on the 2014-2016 CX-5 2.5L PY-engine branch Fitment/availability: Live direct page identifies PY01-13-460 for CX-5 2.5L applications, ships in 1-2 business days and Add to Cart. Mazda service info…
High ConfidenceVerified430 owner reportsLast reported by owners Nov 2022Reviewed Feb 2026
A batch of 2021 model-year 2.5T engines left the factory with defective exhaust valve stem seals. Oil slips past the worn seals during the intake stroke and is burned in the chamber, so owners see the low-oil warning surprisingly early after an oil change (often 3,000-5,000 miles) with consumption rates up to about 1 quart per ~2,000 miles. This is a distinct factory seal defect, not generic high-mileage oil burn. Mazda addressed it with TSB 01-003/23 and a service campaign (reported as SSPD5) covering the eight exhaust valve stem seals.
Common Symptoms
Low oil level warning a few thousand miles after an oil change
Burning oil smell
Light blue/gray exhaust smoke on cold start
Rapid oil consumption (~1 qt per 2,000 mi)
How to Fix
Document oil consumption with a dealer oil-consumption test. The repair under TSB 01-003/23 is in-vehicle replacement of all eight exhaust valve stem seals (~4.2-4.4 hours labor). Check whether the VIN qualifies for extended coverage (reported around 84 months/84,000 miles on affected units) before paying; out-of-pocket the seal job runs roughly $1,500-$2,000. Until repaired, check oil level frequently to avoid running low.
SKYACTIV-G engines are widely reported to develop a slow oil weep at the timing chain cover, where the factory RTV/silicone sealant is applied inconsistently at the seam. Owners find oily film at the front-lower timing-cover area, often discovered at oil-change inspections. Separately, the engine water pump (which sits behind the timing cover) can seep coolant from its weep hole; Mazda has a TSB instructing replacement only if crystallized coolant has accumulated. Both are front-of-engine seepage points distinct from the 2.5T cylinder-head crack.
Common Symptoms
Oily film at front-lower timing chain cover
Dried/crystallized coolant around water pump weep hole
Faint coolant smell
Minor slow oil or coolant loss between services
How to Fix
Confirm whether weeping is oil (timing cover seam) or coolant (water pump weep hole). For a minor timing-cover oil weep many owners monitor it; a proper repair requires removing the cover and resealing with the correct Mazda anaerobic/RTV sealant. For water pump weep, follow the Mazda TSB: if crystallized coolant has built up at the weep hole, replace the water pump (and check for a swollen/failed radiator cap, a documented contributor to over-pressure seepage, ~$35 part). Reseal job $600-$1,400; water pump replacement $400-$900.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Reseal a confirmed timing-cover oil leak using the Mazda repair procedure Fitment/availability: Live direct dealer page identifies genuine R2Y1-10-431 as CX-5 timing-cover sealer, priced with Add to Cart.
Replace a bulletin-confirmed leaking pump on the early naturally aspirated branch Fitment/availability: Indexed direct dealer item identifies PE01-15-010D, gasket included, for CX-5 2.0L 2016-2018 and early 2.5L naturally aspirated catal…
Replace a bulletin-confirmed leaking pump on the 2018-2023 2.5L naturally aspirated without-i-stop branch Fitment/availability: Live direct dealer page identifies PYFA-15-010D for 2.5L non-turbo without i-stop, 2018-2025, gasket included…
Genuine Mazda PY8W-15-010B 2.5 Turbo water pump with gasket
OEMMazda PY8W-15-010B
Replace a bulletin-confirmed leaking pump on the 2019-2023 CX-5 2.5 Turbo branch Fitment/availability: Indexed direct dealer page identifies PY8W-15-010B, gasket included, as the 2.5L turbo pump that supersedes -010 and -010A, with sale …
Rear brake calipers and electronic parking brake (EPB) stick or seize due to moisture accumulation in caliper brackets. This causes uneven brake pad wear, overheating, and premature failure, often before 40,000 miles.
Common Symptoms
Rear brake pads/rotors worn before 40,000 miles
Grinding noise from rear brakes
Emergency parking brake seizure
Vehicle pulling to one side when braking
Brake overheating smell
How to Fix
Replace calipers, rotors, and pads. Clean and lubricate caliper brackets during routine brake service to prevent recurrence.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Lubricate approved caliper slide and metal contact points during a correctly scoped brake service Fitment/availability: Live direct product page identifies CRC 05361 for brake-system component lubrication with Add to Cart. Apply only whe…
High ConfidenceVerified980 owner reportsLast reported by owners Sep 2023Reviewed Feb 2026
CX-5 trims with the electronic parking brake can throw an 'Electric parking brake malfunction' warning with the brake failing to fully release or engaging on only one side. Common causes are a failed EPB caliper actuator motor and, frequently, a bent/corroded pin in the actuator electrical connector that breaks signal continuity. The problem is often triggered after a rear brake-pad service that wasn't done in EPB maintenance/service mode, which strips the motor's gear position. Owners report stored codes for motor gear position mismatch.
Parking brake won't release or releases on one side only
ABS/brake warning lights
Grinding or no movement from the EPB motor
How to Fix
Always retract the EPB using the maintenance/service mode (scan tool or owner's-manual procedure) before rear pad service. Diagnose with a scanner for C2005 / C112A-type motor-position codes, then inspect the actuator connector for bent or corroded pins (a frequently overlooked fix) before condemning the motor. If the actuator motor itself has failed, replace it with the genuine Mazda unit and recalibrate. DIY actuator parts run ~$150-$350 each; dealer diagnosis + replacement typically $400-$900.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Replace a side-confirmed failed rear electronic parking-brake motor Fitment/availability: Live direct dealer page identifies genuine KA0G-26-8EXA for the CX-5, priced with Add to Cart.
A production error on a small batch of 2018 KF CX-5 vehicles left the cement bonding the silicone coating to the curtain air bag base fabric improperly dried. The resulting poor adhesion allows inflation gas to leak through the fabric during deployment, so the curtain bag loses airtightness and does not unfold or stay inflated as designed. In a side impact or a rollover, where the curtain is the primary head protection, the bag can collapse before the occupant contacts it. Approximately 682 vehicles were identified. This is a build-window defect specific to 2018 production and does not carry over to later KF model years.
Common Symptoms
No symptom before a crash - defect is latent
SRS warning light in rare cases
Curtain air bag fails to inflate fully in a side impact or rollover
How to Fix
Free recall remedy. NHTSA campaign 18V426000, Mazda number 2718F: dealers replace the affected curtain air bag modules at no charge. Remedy began July 31, 2018. Check the VIN against the campaign because the affected population is very small and many owners never received a notice.
The CX-5's Smart City Brake Support uses a laser/infrared sensor behind the windshield glass on early cars, plus a grille-mounted radar and forward camera on later i-ACTIVSENSE builds. Two distinct failure patterns are documented. First, repeated 'Smart City Brake Support malfunction' warnings appearing across all conditions - clear days, rain, snow, city and highway - which Mazda technicians attributed to excessive heat affecting the sensor unit, with owners told no fix was available at the time. Second, phantom braking: the system intervening hard at highway speed with no vehicle or obstacle ahead, described by reviewers as overzealous and by owners as intervening too early and too aggressively. Toll transponders mounted near the sensor and a dirty grille emblem covering the radar are documented triggers of both false faults and false interventions.
Common Symptoms
Smart City Brake Support malfunction message on the dash
Vehicle brakes hard at highway speed with nothing ahead
i-ACTIVSENSE warning light illuminated
System disables itself intermittently
Fault clears after cleaning the grille emblem or windshield
Fault returns repeatedly over months
How to Fix
Start with the cheap causes: clean the front Mazda emblem and grille radar face, clean the interior windshield surface directly in front of the SCBS sensor, and relocate any EZ-Pass or toll transponder away from the sensor area. If faults persist, have the dealer check for updated forward-sensing camera / SCBS module calibration software and confirm camera aim - misalignment after a windshield replacement is a common root cause (equipment recall 16E002000 covers improperly affixed SCBS brackets on replacement windshields). A heat-degraded sensor unit requires replacement. The system can be switched off from the settings menu as an interim measure if phantom braking is creating a rear-end collision risk.
The turbocharged 2.5T cylinder head can crack in the aluminum casting near the exhaust manifold flange / stud-bolt holes, where thermal load concentrates. This produces a slow external (and sometimes internal) coolant leak: the reservoir drops with no obvious puddle, a sweet coolant odor appears after shutdown, and white crystallized residue forms on the exhaust side of the head. Left unaddressed the crack widens with heat cycles and can lead to overheating and engine failure. Mazda documented it across TSB 01-013-21, 01-007-22 and 01-002-23, and it is the subject of a U.S. class-action lawsuit covering 2019-2024 CX-5 (and CX-9/Mazda6).
Common Symptoms
Coolant level dropping with no visible puddle
Sweet coolant smell after driving
White/crystallized coolant residue near exhaust manifold
Overheating or temperature gauge climbing
Low coolant warning
How to Fix
Confirm the leak source at the exhaust side of the head (not a hose or water pump). The fix is replacement of the cylinder head assembly with the revised service part (Service Alert SA-058/20) using updated gaskets that redistribute load to the exhaust manifold; severe cases need a long-block/engine. Qualifying VINs built before June 2020 may be covered under Mazda's goodwill Customer Service Program (reported as CSP11, up to ~10yr/120k mi) — check VIN eligibility before paying out of pocket. Out-of-warranty head replacement runs into the thousands; full engine replacement can reach $5,000-$10,000.
AC compressor fails due to leaky seals, inadequate lubrication, or stress from system clogs/moisture. Common failure point for aging CX-5s, particularly in hot climates.
Common Symptoms
No cold air from AC system
Unusual grinding or squealing noises from compressor
AC clutch not engaging when AC is turned on
Visible refrigerant leaks under vehicle
How to Fix
Replace AC compressor, orifice tube, and receiver dryer (required when replacing compressor). Evacuate and recharge system with proper refrigerant amount.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mazda KD45-61-450A A/C compressor with clutch
OEMMazda KD45-61-450A
Replace a confirmed failed compressor on the 2.0L/2.5L naturally aspirated branch Fitment/availability: Indexed direct dealer page identifies KD45-61-450A for CX-5 naturally aspirated SKYACTIV applications, clutch included, with price/Ad…
Genuine Mazda BFD1-61-450A A/C compressor with clutch
OEMMazda BFD1-61-450A
Replace a confirmed failed compressor on the 2019 CX-5 2.5 Turbo branch Fitment/availability: Indexed direct dealer page identifies BFD1-61-450A for CX-5 2.5L turbo, clutch coil included, with sale price/Add to Cart. This is not intercha…
High ConfidenceVerified670 owner reportsLast reported by owners May 2023Reviewed Feb 2026
Community reported
3,200 owners
Low-pressure fuel pump impellers can deform, causing pump failure and engine stalling without warning. Part of massive global recall affecting 19+ million vehicles across multiple manufacturers.
Common Symptoms
Engine no-start condition
Vehicle stalling at low speeds
Sudden engine stall at highway speeds (rare but dangerous)
Loss of power while driving
How to Fix
Dealer replaces fuel pump free of charge under recall. Contact Mazda dealer with VIN to check recall status.
Owner tips & cautions
TipCheck recall status immediately at Mazda dealer
TipSchedule repair ASAP - safety risk
TipKeep fuel tank above 1/2 to reduce pump stress until fixed
High ConfidenceVerified3,200 owner reportsLast reported by owners Aug 2023Reviewed Feb 2026
The 2.2 SKYACTIV-D runs two EGR valves and recirculates exhaust gas aggressively to meet emissions targets. Soot from that recirculated gas bakes onto the intake shutter valve, the intake manifold runners and the EGR passages; owners have found manifolds and EGR valves 80 percent blocked. Once the shutter valve sticks, airflow control is lost - power falls off progressively, multiple dash warnings appear, and the engine can stall with no restart. Mazda Australia recalled 35,476 diesel Mazda3 (2014-2016), Mazda6 (2012-2018) and CX-5 (2012-2018) vehicles specifically over carbon deposits in the intake shutter valve causing premature wear of engine components, with stated symptoms including increased stopping distance and smoke from the engine bay. The clogged manifold also buries the MAP sensor port, which is the near-universal cause of P0106 on this engine.
Common Symptoms
Gradual loss of engine power
Multiple warning lights on the dashboard
Engine stalls and will not restart
Smoke from the engine compartment
Increased braking distance
Rough idle and hesitation under load
How to Fix
Check whether your VIN falls under the diesel carbon-deposit campaign in your market - in Australia the remedy was performed free of charge. Otherwise the repair is mechanical: remove and chemically clean or replace the intake shutter valve, decarbon the intake manifold and EGR valves and cooler, and clean or replace the MAP sensor. Updated ECU calibration reduces recurrence. Prevention is driving pattern - the engine needs regular sustained hot running, not exclusively short urban trips. A P0106 with no other fault on this engine almost always means a soot-blocked MAP port, not a failed sensor.
The Connectivity Master Unit (CMU) fails, causing the infotainment screen to go black, flicker, freeze, or loop repeatedly. Often caused by corrupted firmware, faulty Nav SD card contacts, or failing internal memory.
Common Symptoms
Black or blank infotainment screen
System freezing or rebooting continuously
Loss of backup camera, navigation, audio controls
Screen flickering or looping
How to Fix
Try system reset (hold nav + mute while in reverse), battery disconnect for 10 minutes, or firmware update. If unsuccessful, CMU replacement required.
Owner tips & cautions
TipTry hard reset: Hold nav + mute + back buttons while in reverse
TipDisconnect battery for 10+ minutes to reset CMU
High ConfidenceVerified1,850 owner reportsLast reported by owners Nov 2023Reviewed Feb 2026
Community reported
520 owners
LED daytime running lights flicker and fail due to sulfur corrosion from improper gasket material. Sulfur from gasket corrodes LED circuit, causing premature failure.
Common Symptoms
DRL flickering
One or both DRLs fail to illuminate
No warning indicators on dashboard
Regular headlights remain unaffected
How to Fix
Dealer inspects and replaces sealing gasket, applies protective coating to prevent sulfur formation. Covered under recall.
Owner tips & cautions
TipContact dealer immediately for free recall repair
TipSafety concern - reduced visibility to other drivers
High ConfidenceVerified520 owner reportsLast reported by owners Aug 2022Reviewed Feb 2026
CX-5 models with i-stop (idle stop) use a specific AGM/EFB battery and a battery-management system that monitors charge state to decide whether to allow auto stop-start. The factory battery is undersized (around 480 CCA new) and degrades early; as it weakens, owners get an i-stop warning/triangle, the auto stop-start quits working, and they can see parasitic-drain dead batteries when the car sits 10+ days. Installing a standard flooded battery instead of AGM/EFB, or not re-registering the battery, leaves i-stop disabled and can throw a battery-management malfunction.
Common Symptoms
i-stop / idling stop warning light or triangle
Auto start-stop stops functioning
Battery management system warning
Dead battery after sitting several days
Slow cranking in cold weather
How to Fix
Replace only with the correct AGM (or EFB) battery for i-stop; a higher-CCA AGM (600+ CCA group 35) is a common upgrade over the weak OE unit. After replacement the battery must be registered/i-stop re-initialized (disconnect-and-relearn or scan tool) so the charging system manages it correctly. If drains persist when parked, check for parasitic draw and verify alternator/i-stop charge control. Battery cost $200-$350 installed.
What you need to diagnose it
The fix here starts with a test, not a part — which repair you need depends on what the test finds.
UNI-T UT210E Low-Current DC Clamp Meter
1 mA resolution on the 2 A range — a 0.1 A meter reads a 50 mA drain as zero
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Testing and isolating the fault is DIY work. Replacing or reprogramming a control module is not — most are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.
Interior door panels rust due to improper drainage design allowing water accumulation. Some colors (Soul Red, Machine Grey) have thin paint causing premature rust bubbling on roof and body panels.
Common Symptoms
Rust appearing on inner door panels (all four doors)
Rust bubbles on roof, rocker panels, wheel arches
Paint defects allowing moisture penetration
Recurring rust even after repair
How to Fix
Fix door drainage issues by clearing drain holes, sand and repaint affected areas. May require body panel replacement for severe cases. Limited warranty coverage.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Fluid Film AS11 rust and corrosion protection aerosol, 11.75 ounces
OEMFluid Film AS11
Protect accessible sound or properly repaired door cavities and seams after drainage is restored Fitment/availability: Live direct product page identifies Fluid Film AS11 corrosion-protection aerosol. Follow the label and application gui…
High ConfidenceVerified1,120 owner reportsLast reported by owners Oct 2023Reviewed Feb 2026
Insufficient corrosion-protective coating was applied to the ends of the external cylinders of the rear hatch/liftgate gas stay dampers on first-generation KE CX-5 vehicles built December 15, 2011 through December 26, 2015. Water carrying road salt enters the exposed cylinder end and corrodes it; over time the corroded strut can fracture as the liftgate is being opened. The hatch then drops suddenly onto whoever is standing under it, and broken strut fragments can be thrown. Roughly 575,000 U.S. vehicles were covered across CX-5, CX-3, Mazda3 and Mazda5, making it one of the largest Mazda campaigns of the decade. Owners in the salt belt reported failures well before the recall notice arrived, and parts were initially unavailable when the campaign opened in April 2017.
Common Symptoms
Liftgate will not stay open and falls on its own
Liftgate drops suddenly while loading cargo
Visible rust or pitting on the shiny strut cylinder
Liftgate feels heavy or requires holding up by hand
Popping or snapping sound when opening the hatch
How to Fix
Free recall remedy. NHTSA campaign 16V644000, Mazda internal recall 9916H: dealers replace both liftgate gas stay dampers at no charge. If the vehicle is outside the campaign or the struts were already replaced with uncoated aftermarket units, replace both struts as a pair and inspect the cylinder ends for pitting at each oil change in salt-belt states. Never work under a liftgate that no longer holds itself open.
On sunroof-equipped CX-5s the front sunroof drain hoses work loose from their drain-tray nipples behind the A-pillar trim, or the tubes clog with organic debris. Because nothing visibly leaks at the headliner, water tracks down inside the pillar and body cavity and pools under the carpet - most often in the rear passenger footwell, the lowest point of the floor pan - so owners discover the problem as a soaked carpet or a persistent musty smell long after the leak started. Sustained wetting under the carpet corrodes floor-mounted connectors and modules and drives mildew growth. The failure is reported across both KE and KF generations, from 2012-2013 cars through 2018 and later.
Common Symptoms
Wet carpet in the rear passenger footwell
Driver or passenger side floor soaked after rain
Musty or mildew smell inside the cabin
Water dripping from the A-pillar or headliner edge
Fogged windows that will not clear
Electrical faults after heavy rain
How to Fix
Test each drain by pouring water into the front sunroof corner troughs and watching for discharge below the vehicle. If it pools, the tube is clogged - clear it from the exit end with trimmer line or low-pressure compressed air rather than forcing a stiff snake down from the top, which can pop the tube off. If it drains but the interior is still wet, pull the A-pillar trim and reseat the hose on the tray nipple; many owners secure it with a small clamp or zip tie. Clean the sunroof rubber seal as part of the repair, pull and dry the carpet and jute padding fully, and inspect any under-carpet connectors for corrosion.
Wheel bearings fail prematurely due to impact damage (potholes, curbs), contamination from water/salt/grit, or manufacturing defects. Common issue across all model years.
Common Symptoms
Growling or humming noise that increases with speed
Vibration in steering wheel or vehicle body
Vehicle pulling to one side
Loose or sloppy steering feel
Uneven tire wear
How to Fix
Replace wheel bearing hub assembly. Should be covered under warranty if caught early (within 36,000 miles).
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Genuine Mazda KD35-33-04XJ front wheel hub and bearing
OEMMazda KD35-33-04XJ
Replace a confirmed failed front hub on the VIN-matched CX-5 branch Fitment/availability: Live direct OEM page identifies KD35-33-04XJ, lists 2013-2025 Mazda applications, ships in 1-2 business days and Add to Cart.
Genuine Mazda KD31-26-15XB rear FWD hub and bearing
OEMMazda KD31-26-15XB
Replace a confirmed failed rear hub on 2013-2021 CX-5 FWD applications Fitment/availability: Live direct OEM page identifies KD31-26-15XB as a rear wheel hub, lists 2013-2021 CX-5 fitment, ships in 1-2 business days and Add to Cart. OEM …
Genuine Mazda KD35-26-15XD rear AWD hub and bearing
OEMMazda KD35-26-15XD
Replace a confirmed failed rear hub on CX-5 AWD applications Fitment/availability: Live direct OEM page identifies KD35-26-15XD as the CX-5 rear wheel hub, ships in 1-2 business days and Add to Cart. OEM catalog evidence scopes the branc…
High ConfidenceVerified890 owner reportsLast reported by owners Dec 2023Reviewed Feb 2026
Community reported
1,560 owners
Clunking, knocking, or rattling from front suspension caused by dry strut mount bearings, loose sway bar links, worn ball joints, or loose crossbar/cowl bolts.
Common Symptoms
Clunking noise over bumps or sharp turns
Rattling from front end
Noise increases with road irregularities
May feel vibration through steering wheel
How to Fix
Grease strut mount bearings, tighten crossbar/cowl bolts to proper torque, replace sway bar links or worn suspension components as needed.
Owner tips & cautions
TipGrease strut mount bearings with lithium grease every 30,000 miles
TipTorque crossbar bolts to 15 ft-lbs (common looseness)
High ConfidenceVerified1,560 owner reportsLast reported by owners Jun 2023Reviewed Feb 2026
The six-speed FW6A-EL automatic in the CX-5 locks its torque converter clutch very early and holds it locked across a wide range to chase fuel economy. That aggressive lock-up strategy wears the lock-up clutch lining, and the resulting iron powder contaminates the ATF. Owners report a distinct shudder or judder - like driving over rumble strips - most often felt after an upshift, under light throttle on an incline, or in third gear and above, typically emerging around 80,000 to 100,000 miles. On 2018 and later 2.5L cars with cylinder deactivation, the deactivation event introduces its own driveline vibration that both aggravates and masks the shudder, so the two get confused during diagnosis. Mazda's current dealer-level repair is a torque converter replacement rather than a full transaxle exchange, though earlier cases were resolved with complete transmission replacements under warranty.
Common Symptoms
Rumble-strip shudder at steady light throttle
Vibration after upshifts, especially climbing a grade
Judder felt in 3rd gear and higher
Shudder disappears when you touch the throttle or brake
Metallic glitter in the ATF pan or on the magnet
How to Fix
Confirm the shudder is lock-up related by feeling for it only in the lock-up window (steady light throttle, no downshift). A drain-and-fill with genuine Mazda FZ ATF sometimes reduces it temporarily; friction-modifier additives are a band-aid, not a repair. The real fix is torque converter replacement with fresh fluid and a cooler line flush to purge the iron-contaminated fluid. Do not accept an ATF flush alone on a high-mileage unit with metal in the pan. Powertrain warranty (5yr/60k) covers this on newer cars; out of warranty, budget for the converter job.
Second-generation KF CX-5 owners report a distinct chirp or squeak from the transaxle during the 3-4 upshift, most audible at light to moderate throttle once the transmission is at operating temperature. It is not the lock-up shudder felt through the seat - it is an audible chirp tied to one specific shift event. Mazda documented the condition and issued service bulletin 05-005/23 covering 2017-2025 CX-5 vehicles, which makes this a manufacturer-acknowledged condition rather than an owner theory. Owners on Mazdas247 have tracked dealer responses under the bulletin across multiple model years.
Common Symptoms
Audible chirp or squeak during the 3-4 upshift
Noise only present once the transmission is warm
Noise repeatable at light to moderate throttle
No corresponding vibration or slipping felt
How to Fix
Reference Mazda service bulletin 05-005/23 by number when you take the vehicle in - many service advisors will otherwise call the noise normal and decline to open a case. The bulletin-directed repair addresses the transaxle internal component responsible for the chirp; work is covered under the 5yr/60,000-mile powertrain warranty if the vehicle is within limits. Have the technician road-test with you present so the noise is reproduced and documented on the repair order, since it only occurs on the 3-4 upshift at temperature.
CX-5 owners across both generations report windshields that crack with no rock chip or identifiable impact point - cracks that begin at the A-pillar edge or the lower frit band and run across the glass, sometimes appearing overnight or after a temperature swing. The thin, lightweight laminated glass Mazda specifies appears to have little tolerance for body flex and thermal stress. The 2016 model year alone carries 22 documented cracked-windshield complaints, with additional clusters on 2013 and 2018. The financial sting is bigger on 2016.5 and later i-ACTIVSENSE cars, where the windshield-mounted forward sensing camera must be recalibrated after any glass replacement - and if a replacement windshield's Smart City Brake Support sensor bracket is improperly affixed, that itself was the subject of an equipment recall.
Common Symptoms
Crack appears with no visible chip or impact point
Crack originates at the A-pillar edge or bottom of the glass
Crack appears after a large ambient temperature change
Crack propagates rapidly across the driver's view
Forward sensing camera / SCBS fault after glass replacement
How to Fix
No recall or warranty extension exists for the glass itself. Dealers routinely deny warranty coverage by attributing the crack to a road impact, so photograph the crack origin immediately and note the absence of a chip. Comprehensive insurance glass coverage is the practical route. Insist that the replacement be OEM or OEM-equivalent with correct sensor bracket geometry, and require a documented forward-camera recalibration on i-ACTIVSENSE-equipped cars (equipment recall 16E002000 covers improperly affixed Smart City Brake Support brackets on replacement windshields).
CX-5 owners report unusually thin paint film and a fragile clear coat that chips on the hood, front fascia, A-pillars and mirror caps far earlier than the segment norm. Complaints intensify from the 2016.5 refresh forward and are heaviest on the Soul Red Crystal three-stage finish, though other colors show it as well. Documented cases include hood chips within two months of delivery on a 2021, clear coat that scratches under a fingernail plus specks trapped under the clear on a 2020, and hundreds of small chips at only 14,000 miles on a 2022. Soul Red Crystal is particularly punishing to repair because the three-layer process is difficult to blend - a small chip often means refinishing the whole panel.
Common Symptoms
Numerous small paint chips on the hood and front bumper
Clear coat scratches under light fingernail pressure
Specks or contamination visible under the clear coat
Chips appearing within months of delivery
Chips down to primer or bare metal at low mileage
How to Fix
No recall or warranty extension. Report chips to the dealer within the paint warranty period and photograph them - a documented pattern of chipping across a panel is easier to escalate than a single chip. The effective mitigation reported by owners is paint protection film on the hood, front bumper, mirrors and A-pillars applied at or right after delivery; owners who did this report no chip problems years later. For existing damage use touch-up on small chips promptly to prevent corrosion, and expect full-panel refinishing quotes for Soul Red Crystal because of the three-stage color match.
CX-5 owners report a speed-dependent whine or hum that rises and falls with road speed but is unaffected by engine speed or gear - the classic signature of a failing gear-set bearing rather than a transmission or tire issue. Two separate sources exist. On the transaxle side, Mazda issued a service bulletin covering 2013-2016 and certain 2017-2018 vehicles for a whine above roughly 10 mph traced to a damaged internal bearing. On AWD cars, the rear differential front housing was the culprit; Mazda modified that housing in October 2015 specifically to eliminate the bearing-failure noise, which dates the design defect to pre-October-2015 production. Mazda calls the rear differential and transfer case fluid 'lifetime,' and the units hold very small fluid volumes, so heat-degraded fluid accelerates the bearing wear.
Common Symptoms
Whine or hum that changes with road speed only
Noise present when coasting in neutral
Noise from the rear of the vehicle on AWD models
Whine that begins above roughly 10 mph
Growl that changes pitch but not with engine RPM
How to Fix
Distinguish the noise source before spending money: a whine that tracks road speed only and is present in neutral coasting points at the driveline, not the engine. Rule out tire cupping and wheel bearings first. For pre-October-2015 AWD cars the remedy is the revised rear differential front housing / differential assembly. Preventively, ignore the 'lifetime fluid' label and change the rear differential and transfer case fluid every 30,000 to 60,000 miles with genuine Mazda spec fluid - it is a cheap hedge against a bearing failure that costs an order of magnitude more.
What is the 2013-2022 Mazda CX-5 Excessive Engine Oil Consumption?
Defective valve stem seals allow oil to leak into combustion chambers, causing excessive oil consumption and potential catastrophic engine failure if oil levels drop critically low. Issue primarily affects 2013-2014 models with resurgence in 2021-2022. Severity: high.
What is the 2013-2019 Mazda CX-5 Sticking Brake Calipers and Premature Wear?
Rear brake calipers and electronic parking brake (EPB) stick or seize due to moisture accumulation in caliper brackets. This causes uneven brake pad wear, overheating, and premature failure, often before 40,000 miles. Severity: high.
What is the 2013-2021 Mazda CX-5 SKYACTIV-D 2.2 Diesel Engine Oil Dilution from Interrupted DPF Regeneration?
The 2.2 SKYACTIV-D uses post-injection of diesel into the cylinder to raise exhaust temperature for diesel particulate filter regeneration. Fuel that is not burned washes past the rings into the sump. If the engine is shut off mid-regeneration - the normal outcome of short urban… Repairs typically run $120-$4,500. Severity: high.
What is the 2013-2018 Mazda CX-5 SKYACTIV-D 2.2 Intake Shutter Valve and EGR Carbon Deposit Buildup (Diesel Recall)?
The 2.2 SKYACTIV-D runs two EGR valves and recirculates exhaust gas aggressively to meet emissions targets. Soot from that recirculated gas bakes onto the intake shutter valve, the intake manifold runners and the EGR passages; owners have found manifolds and EGR valves 80 percent… Repairs typically run $0-$1,500. Severity: high.
What is the 2018 Mazda CX-5 Side Curtain Air Bag Silicone Coating Delamination / Gas Leak on Deployment (Recall 18V426)?
A production error on a small batch of 2018 KF CX-5 vehicles left the cement bonding the silicone coating to the curtain air bag base fabric improperly dried. The resulting poor adhesion allows inflation gas to leak through the fabric during deployment, so the curtain bag loses a… Repairs typically run $0-$0. Severity: high.
What is the 2019-2020 Mazda CX-5 SKYACTIV-G 2.5T Cracked Cylinder Head Coolant Leak?
The turbocharged 2.5T cylinder head can crack in the aluminum casting near the exhaust manifold flange / stud-bolt holes, where thermal load concentrates. This produces a slow external (and sometimes internal) coolant leak: the reservoir drops with no obvious puddle, a sweet cool… Repairs typically run $2,300-$9,500. Severity: high.
What is the 2018-2019 Mazda CX-5 Cylinder Deactivation Rocker Arm Dislodgement / Engine Stall (Recall 19V-497)?
On the 2.5L NA engine equipped with cylinder deactivation, faulty PCM software could mismanage the oil-pressure transition of the switchable hydraulic lash adjusters (HLAs) when switching between 2-cylinder and 4-cylinder modes. This let an intake rocker arm slip off the valve ti… Repairs typically run $0-$3,000. Severity: high.
What is the 2013-2023 Mazda CX-5 Carbon Buildup on Intake Valves (Skyactiv)?
Direct-injection Skyactiv engines accumulate carbon deposits on intake valves due to oil vapors from the PCV system. Without port injection to clean valves, carbon can fuse to valve surfaces over time, typically appearing around 65,000+ miles. Severity: medium.
What is the 2014-2021 Mazda CX-5 Infotainment System CMU Failure (Black Screen)?
The Connectivity Master Unit (CMU) fails, causing the infotainment screen to go black, flicker, freeze, or loop repeatedly. Often caused by corrupted firmware, faulty Nav SD card contacts, or failing internal memory. Severity: medium.
What is the 2017-2021 Mazda CX-5 Rust on Door Panels and Body?
Interior door panels rust due to improper drainage design allowing water accumulation. Some colors (Soul Red, Machine Grey) have thin paint causing premature rust bubbling on roof and body panels. Severity: medium.
What is the 2013-2022 Mazda CX-5 Premature Wheel Bearing Failure?
Wheel bearings fail prematurely due to impact damage (potholes, curbs), contamination from water/salt/grit, or manufacturing defects. Common issue across all model years. Severity: medium.
What is the 2013-2018 Mazda CX-5 Mass Airflow (MAF) Sensor Failure?
MAF sensor becomes contaminated with dirt or suffers water damage, providing incorrect air intake readings. Causes vehicle to enter "limp mode" with severe performance degradation. Severity: medium.
What is the 2013-2019 Mazda CX-5 Air Conditioning Compressor Failure?
AC compressor fails due to leaky seals, inadequate lubrication, or stress from system clogs/moisture. Common failure point for aging CX-5s, particularly in hot climates. Severity: medium.
What is the 2016 Mazda CX-5 Daytime Running Light (DRL) Failure?
LED daytime running lights flicker and fail due to sulfur corrosion from improper gasket material. Sulfur from gasket corrodes LED circuit, causing premature failure. Severity: medium.
What is the 2013-2016 Mazda CX-5 Exhaust Manifold/Gasket Leaks?
Exhaust manifold gasket becomes deformed from impact (speed bumps, road debris), causing exhaust leaks. Can also develop manifold cracks over time from heat cycling. Severity: medium.
What is the 2013-2016 Mazda CX-5 Rear Liftgate Gas Strut Corrosion and Sudden Hatch Drop (Recall 16V644)?
Insufficient corrosion-protective coating was applied to the ends of the external cylinders of the rear hatch/liftgate gas stay dampers on first-generation KE CX-5 vehicles built December 15, 2011 through December 26, 2015. Water carrying road salt enters the exposed cylinder end… Repairs typically run $0-$180. Severity: medium.
What is the 2013-2022 Mazda CX-5 Torque Converter Lock-Up Clutch Shudder / Judder (FW6A-EL Automatic)?
The six-speed FW6A-EL automatic in the CX-5 locks its torque converter clutch very early and holds it locked across a wide range to chase fuel economy. That aggressive lock-up strategy wears the lock-up clutch lining, and the resulting iron powder contaminates the ATF. Owners rep… Repairs typically run $1,200-$3,200. Severity: medium.
What is the 2013-2018 Mazda CX-5 Transaxle Bearing Whine and Rear Differential Housing Noise (AWD)?
CX-5 owners report a speed-dependent whine or hum that rises and falls with road speed but is unaffected by engine speed or gear - the classic signature of a failing gear-set bearing rather than a transmission or tire issue. Two separate sources exist. On the transaxle side, Mazd… Repairs typically run $150-$2,400. Severity: medium.
What is the 2013-2021 Mazda CX-5 Sunroof Drain Tube Disconnection and Interior Water Intrusion?
On sunroof-equipped CX-5s the front sunroof drain hoses work loose from their drain-tray nipples behind the A-pillar trim, or the tubes clog with organic debris. Because nothing visibly leaks at the headliner, water tracks down inside the pillar and body cavity and pools under th… Repairs typically run $100-$600. Severity: medium.
