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Mazda · Known Issues

2007-2025 Mazda CX-9 Problems: 12 Known Issues

2007-2025 model years · 4,750+ owner reports · Updated October 2026

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Issue summary

According to Au7o's analysis of 4,750+ owner reports, the 2007-2025 Mazda CX-9 has 12 documented known issues, with 6 rated critical. The most serious are Timing Chain Stretch on 3.7L V6 ($1,500-$3,500 repair), Water Pump and Coolant Crossover Pipe Leak (3.7L V6) ($1,500-$3,500 repair), Low-Pressure Fuel Pump Impeller Cracking and Stall (Denso Pump Recall) ($0-$0 repair), Cracked Cylinder Head Coolant Leak (2.5L Turbo SkyActiv PY-VPTS), Takata Passenger Airbag Inflator Rupture (Do Not Drive Advisory) ($0-$0 repair) and Front Lower Control Arm Ball Joint Corrosion and Separation ($0-$0 repair). The most commonly reported issue is Timing Chain Stretch on 3.7L V6 with 2,400 owner reports. Across all issues with published estimates, repair costs range from $150 to $3,500. DIY maintenance guides at au7o.io.

In This Article

  • CX-9 Engine4
  • CX-9 Cooling2
  • CX-9 Fuel System1
  • CX-9 Safety/Recalls1
  • CX-9 Suspension1
  • CX-9 Electrical2
  • CX-9 Drivetrain1
  • Recalls1
  • FAQ
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In This Article

  • Engine4
  • Cooling2
  • Fuel System1
  • Safety/Recalls1
  • Suspension1
  • Electrical2
  • Drivetrain1
  • Recalls1
  • FAQ

All 12 Known Issues

NHTSA Recalls1 recall

SEATS:MID/REAR ASSEMBLY

Mazda North American Operations (Mazda) is recalling certain 2020-2021 CX-9 vehicles equipped with 60/40 split bench second-row seats. The left-side second-row seat may unexpectedly slide forward during a crash. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."

Campaign #21V75000027/09/2021

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

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Other Mazda Models

Mazda CX-529Mazda CX-6027Mazda CX-5026Mazda MX-5 Miata22Mazda Mazda320Mazda MX-620

Frequently Asked Questions

What are the most common Mazda CX-9 problems?

According to Au7o's analysis of 4,750+ owner reports, the 2007-2025 Mazda CX-9 has 12 documented issues. The most frequently reported are: Timing Chain Stretch on 3.7L V6, Water Pump and Coolant Crossover Pipe Leak (3.7L V6), Low-Pressure Fuel Pump Impeller Cracking and Stall (Denso Pump Recall). Of these, 6 are rated critical and should be addressed promptly.

Is the Mazda CX-9 reliable?

The 2007-2025 Mazda CX-9 has 12 known issues documented across 4,750+ owner reports. 6 issues are rated critical: Timing Chain Stretch on 3.7L V6 and Water Pump and Coolant Crossover Pipe Leak (3.7L V6) and Low-Pressure Fuel Pump Impeller Cracking and Stall (Denso Pump Recall) and Cracked Cylinder Head Coolant Leak (2.5L Turbo SkyActiv PY-VPTS) and Takata Passenger Airbag Inflator Rupture (Do Not Drive Advisory) and Front Lower Control Arm Ball Joint Corrosion and Separation. 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-9 problems?

Repair costs for known Mazda CX-9 issues range from $0 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Timing Chain Stretch on 3.7L V6, typically costs $1,500-$3,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year Mazda CX-9 is the most reliable?

Reliability varies across model years of the Mazda CX-9. 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 2007-2025 Mazda CX-9 with 12 documented issues documented across 4,750+ owner reports.

What is the 2007-2015 Mazda CX-9 Timing Chain Stretch on 3.7L V6?

The Ford-derived 3.7L Duratec V6 in first-generation CX-9 suffers from timing chain stretch, typically between 80,000-120,000 miles. Chain guides and tensioners wear, causing timing to retard and triggering check engine codes. If not addressed, can lead to jumped timing and sever… Repairs typically run $1,500-$3,500. 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.

Data sourced from 4,750+ owner reports, NHTSA recalls, TSBs, and automotive forums.

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ALL YEARS2025202420232022202120202019201820172016201520142013201220112010200920082007
Community reported
2,400 owners

The Ford-derived 3.7L Duratec V6 in first-generation CX-9 suffers from timing chain stretch, typically between 80,000-120,000 miles. Chain guides and tensioners wear, causing timing to retard and triggering check engine codes. If not addressed, can lead to jumped timing and severe engine damage.

This issue also affects: Mazda B-Series, Mazda CX-7, Mazda Mazda6

Common Symptoms

  • Rattling noise on cold start from timing chain area
  • Check engine light with P0016, P0017, or P0018 cam/crank correlation codes
  • Rough idle and intermittent stalling
  • Engine performance noticeably degraded at higher mileage

How to Fix

Replace timing chain, guides, tensioners, and cam phasers as a complete kit. This is a labor-intensive job requiring partial engine disassembly. Recommended to replace water pump and thermostat while engine is apart.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Melling 3-1047S professional timing set
    OEMMelling 3-1047S

    Early V6 timing-set branch for 2007 3.5L, 2008-2010 3.7L and qualifying 2011 vehicles produced through December 14, 2010 Fitment/availability: Direct indexed product page identifies Melling 3-1047S for 2007-2011 CX-9, with 2007 3.5L, 200…

    PartsGeek
  • Melling 3-1049SC professional timing set
    OEMMelling 3-1049SC

    Late V6 timing-set branch for qualifying 2011 vehicles produced after December 14, 2010 through 2015 3.7L Fitment/availability: Direct indexed product page identifies Melling 3-1049SC for late-2011 through 2015 CX-9 3.7L, explicitly from…

    PartsGeek

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

  • TipUse full synthetic 5W-20 oil and change every 5,000 miles to prolong chain life
  • TipReplace water pump and thermostat during timing chain job - saves labor cost. CX9Club.com timing chain thread
Typical repair cost:$1,500 - $3,500

Research This Issue

Based on 2,400 owner reports

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Community Reported
High ConfidenceVerified2,400 owner reportsLast reported by owners May 2024Reviewed Feb 2026

Certain 2016–2020 CX-9 vehicles with the 2.5L turbo engine can leak coolant from cracks in the cylinder head near the exhaust-manifold mounting area. Mazda revised the head and exhaust-manifold gasket. Repair depends on diagnosis: a replacement cylinder head is a documented remedy when the bulletin's checks do not indicate overheating or coolant contamination of the oil; more extensive engine damage requires a different repair assessment.

Common Symptoms

  • Unexplained coolant loss with no visible puddle
  • Steam or sweet coolant smell from the firewall side of the engine bay
  • Low coolant warning returning after repeated top-offs
  • Engine temperature gauge climbing under load or in traffic
  • Overheating and eventual engine failure

How to Fix

Have a Mazda technician confirm the leak source and follow the current cylinder-head bulletin. In 01-002/23, DTC P111A or milky oil routes the repair to a partial-engine approval assessment; otherwise the specified remedy is a revised cylinder head and manifold gasket, not automatic long-block replacement. Check CSP11 eligibility by VIN. It covers the specified coolant-leak repair for 10 years or 120,000 miles, whichever comes first, from the original warranty start date; its CX-9 production range is February 11, 2016 through June 9, 2020. Stop safely if overheating occurs; do not continue driving by repeatedly topping up coolant.

Find a nearby Mazda repair shop in Google Maps ↗

Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Oct 2026

The second-generation CX-9 with the 2.5L turbocharged SkyActiv-G engine can develop timing chain stretch, producing a rattle or whine at startup that may persist for several seconds. Unlike the first-gen 3.7L V6 issue, the 2.5T chain stretch is typically less severe but still requires attention. The issue is linked to extended oil change intervals and use of non-synthetic oil allowing chain guide and tensioner wear.

This issue also affects: Mazda B-Series, Mazda CX-7, Mazda Mazda6

Common Symptoms

  • Rattle or whine at cold startup lasting 2-10 seconds
  • Check engine light
  • Reduced engine performance
  • Rough idle after cold start
  • Metallic ticking noise from engine

How to Fix

Use full synthetic 0W-20 oil and change at 5,000-mile intervals (not the 7,500-10,000 Mazda suggests for normal driving). If chain rattle is present, the timing chain, tensioner, and guides should be replaced. Mazda has issued TSBs for software updates to address cold-start rattle in some model years. Inspect during valve cover gasket or cam seal service.

Typical repair cost:$800 - $2,000

Research This Issue

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Community Reported
Medium Confidence

Mazda documents increased oil consumption from damaged exhaust valve seals, with low-oil warning and possible P250F:00. The CX-9 scope is certain 2021 2.5T vehicles: US/Canada 10.25-inch-display VINs JM3TC******509027–541070 (October 6, 2020–September 13, 2021), or Canada/Mexico 7/9-inch-display VINs JM3TC******451418–455173 (October 6, 2020–September 11, 2021).

Common Symptoms

  • Low engine oil level warning
  • Measured oil-level decrease
  • P250F:00 may be stored

How to Fix

Have Mazda confirm the technical bulletin's exact market, display and VIN branch, external leakage and prior seal-repair history. SSPD5 is a separate eligibility gate: its published CX-9 range is US/Canada 10.25-inch-display VINs JM3TC******509027–541070, and the vehicle must also qualify in eMDCS. The wider Canada/Mexico 7/9-inch branch in bulletin 01-007/24 does not establish SSPD5 coverage. For eligible SSPD5 vehicles, use its conditional repair/test/hotline path. Otherwise obtain the applicable market-specific Mazda service procedure and coverage decision; do not apply the US program automatically. Internal seal repair requires trained technicians and special tools; intake blasting, catch cans and automatic plug replacement are not substitutes.

Research This Issue

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Community Reported
Medium ConfidenceVerifiedReviewed Oct 2026

The Ford-derived 3.7L Cyclone V6 in first-gen CX-9 models has a water pump mounted in the engine V that is driven by the timing chain. The pump seal and the coolant crossover pipe gaskets are common failure points, causing coolant to leak internally or externally. Because the pump is chain-driven and located behind the timing cover, replacement is extremely labor-intensive.

This issue also affects: Mazda 626, Mazda CX-5, Mazda Mazda6

Common Symptoms

  • Coolant leak from front/center of engine
  • Overheating at idle or in traffic
  • Low coolant warning
  • Sweet coolant smell
  • White residue around timing cover area

How to Fix

Replace the water pump, timing chain, tensioners, and guides as a complete job since they share access. Budget for 10-15 hours of labor. Replace the coolant crossover pipe gaskets at the same time. Use OEM or high-quality parts — this is not a job you want to repeat. Some shops quote $2,000-$3,500 depending on the region.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Gates 43316 internal engine water pump
    OEMGates 43316

    Confirm VIN/build date because the later pump bra

    PartsGeek
  • Gates 42044 internal engine water pump
    OEMGates 42044

    Confirm VIN/build date and kit contents before purchase.

    PartsGeek

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$1,500 - $3,500

Research This Issue

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Community Reported
Medium Confidence

First-generation CX-9 models are prone to A/C evaporator core leaks, causing gradual refrigerant loss and reduced cooling performance. The evaporator develops pinhole leaks from internal corrosion, often accelerated by moisture and debris in the system. Symptoms worsen in hot weather and the system may need annual recharges before the leak source is identified, as evaporator leaks are difficult to detect without UV dye.

Common Symptoms

  • A/C gradually loses cooling over weeks/months
  • A/C only cold after recharge for a few months
  • Musty smell from vents
  • Water dripping on passenger footwell
  • A/C compressor short-cycling

How to Fix

Replace the A/C evaporator core, which requires dashboard removal (8-12 hours labor). Have the system evacuated, replace the receiver/drier and expansion valve, and recharge with R-134a. Add UV dye during recharge to make future leaks easier to detect. This is expensive due to labor, but recharging annually is not a long-term solution as moisture entering the system causes further damage.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Mazda front primary A/C evaporator core L206-61-J10A
    OEMMazda L206-61-J10A

    Front/primary HVAC evaporator after a leak at that core is confirmed Fitment/availability: Live direct OEM page identifies Mazda L206-61-J10A, front position, primary HVAC, for 2007-2015 CX-9; it supersedes L206-61-J10.

    Mazda OEM Parts Online

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$800 - $1,800

Research This Issue

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Community Reported
Medium Confidence

US recall 21V875 / Mazda 5321K includes certain 2018–2019 CX-9 vehicles built April 16–October 17, 2018 with affected Denso low-pressure fuel pumps. Mazda identifies 13,359 CX-9s across those two model years, not every CX-9. Impeller material can crack and deform until it interferes with the pump body. Pump failure can prevent starting or cause a stall at low speed and, rarely, at higher speed. A check-engine light or rough running may occur; these are not guaranteed advance warnings.

Common Symptoms

  • Engine does not start
  • Engine stalls at low speed or, rarely, at higher speed
  • Rough engine operation
  • Check-engine light

How to Fix

Ask a Mazda dealer to confirm VIN eligibility and repair history for recall 21V875 / 5321K. Dealers replace affected fuel pumps with improved parts free of charge. Have current starting or stalling symptoms diagnosed as well; an open recall does not by itself establish the cause of every symptom or rule out another fault.

Find a nearby Mazda dealer in Google Maps ↗

Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.

Typical repair cost:$0 - $0

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Oct 2026

Recalled Takata passenger-airbag inflators in certain 2007–2015 CX-9 vehicles can rupture during deployment, sending metal fragments into the cabin. Heat, humidity and temperature cycling can degrade the propellant. Mazda's August 2024 do-not-drive advisory covers unrepaired affected vehicles. NHTSA groups the CX-9 with campaigns 17V429, 17V457, 18V018, 18V717 and 19V782; applicability must be checked by VIN. Campaign 19V782/1317F specifically includes certain 2007–2012 CX-9s previously given interim non-desiccated replacement inflators. A previous repair therefore does not necessarily establish completion of the final remedy.

Common Symptoms

  • No advance warning of the recalled inflator rupturing
  • An open affected Takata campaign requires repair regardless of warning-lamp behavior

How to Fix

Check the VIN for open Takata airbag recalls. If this CX-9 has an unrepaired campaign covered by Mazda's do-not-drive advisory, do not drive it; contact a Mazda dealer immediately for the free recall repair and towing arrangements. Mobile repair is available through participating dealers, and a free interim loaner may be provided if needed. Have the dealer verify campaign history because an earlier interim inflator replacement may not have completed the permanent remedy.

Find a nearby Mazda dealer in Google Maps ↗

Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.

Typical repair cost:$0 - $0

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Oct 2026

Certain 2007–2014 CX-9 vehicles built October 24, 2006–December 28, 2013 are covered by recall 15V451 / Mazda 8515G. Water and road salt can enter the front lower ball-joint fitting, causing corrosion, looseness and a possible rattle. Continued operation can lead to separation of the ball joint and lower control arm, affecting steering control. Mazda initially prioritized salt-state vehicles because of parts availability; recall applicability is determined by VIN, not current location.

Common Symptoms

  • Rattle from the front lower control arm ball joint
  • Sudden loss of steering control if the joint separates

How to Fix

Have a Mazda dealer check the VIN for recall 15V451 / 8515G. The recall remedy replaces both front lower control arms and spacers at no charge. If there is looseness, a new suspension noise or abnormal steering, arrange professional inspection promptly; do not rely on a past recall entry as a diagnosis of the present condition.

Find a nearby Mazda dealer in Google Maps ↗

Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.

Typical repair cost:$0 - $0

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Oct 2026

The Connectivity Master Unit that runs Mazda Connect / MZD Connect on the CX-9 fails in a recognizable pattern: the screen freezes and stops responding to both the touchscreen and the commander knob, the system reboots repeatedly on its own, or it comes up blank with a long delay before any image appears. Because the same unit drives the backup camera, navigation, Bluetooth and audio, a CMU failure takes the reversing camera with it - which is a safety and inspection issue, not just an inconvenience. Some cars also show 'ghost touch,' where the screen registers inputs nobody made and menus cycle on their own. The wider Mazda Connect complaints produced a class action settlement and a customer service program (CSP13).

Common Symptoms

  • Infotainment screen frozen and unresponsive to touch or the commander knob
  • System reboots repeatedly or is stuck in a boot loop
  • Blank or black screen, or very long start-up delay
  • Backup camera image missing
  • Ghost touch - menus changing with no input
  • Bluetooth and navigation unavailable

How to Fix

Have the dealer identify the source of the Mazda Connect fault before replacing a CMU; software, display, navigation media, wiring and camera faults require different repairs. For certain 2016–2020 CX-9s, ask the dealer to check CSP13 eligibility by VIN. The program covers software updates and necessary CMU repairs or replacement for 24 months: from February 17, 2025 if the new-vehicle warranty had already expired, otherwise from that warranty's expiration. Do not assume it covers display screens, controls, SD cards or wiring, or that every blank-screen/ghost-touch fault qualifies.

Find a nearby Mazda dealer in Google Maps ↗

Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Oct 2026
Community reported
750 owners

The power liftgate system fails to open, close, or hold position. Causes include liftgate strut motors wearing out, latch mechanism failure, and wiring harness damage in the rubber boot between body and liftgate. Cold weather exacerbates the issue as struts lose gas pressure.

Common Symptoms

  • Liftgate does not open or close with button press
  • Liftgate opens partially then reverses
  • Liftgate drops or does not hold open position
  • Error beeps when trying to operate liftgate

How to Fix

Replace power liftgate strut motors (sold as a pair). Check and repair wiring harness in the liftgate rubber boot for broken wires. Replace latch mechanism if liftgate does not latch properly.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Mazda driver-side power liftgate drive TK49-63-6EXL
    OEMMazda TK49-63-6EXL

    Left/driver powered liftgate slider when that drive is electrically or mechanically proven failed Fitment/availability: Live direct OEM page identifies driver side TK49-63-6EXL for 2016-2023 CX-9 2.5L, with its superseded suffixes listed…

    MazdaPartsNow
  • Genuine Mazda passenger-side power liftgate drive TK49-62-6EXL
    OEMMazda TK49-62-6EXL

    Confirm VIN and failed sid

    MazdaPartsNow
  • Genuine Mazda power liftgate latch TK49-62-310C
    OEMMazda TK49-62-310C

    Do not us

    MazdaPartsNow

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

  • TipCheck wiring in rubber boot between body and liftgate - flexing breaks wires over time
  • TipLubricate latch mechanism and strut pivots annually with white lithium grease - MazdaCX9Forum.com
Typical repair cost:$300 - $900

Research This Issue

Based on 750 owner reports

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Community Reported
High ConfidenceVerified750 owner reportsLast reported by owners Oct 2024Reviewed Feb 2026
Community reported
1,600 owners

AWD-equipped CX-9 models develop fluid leaks from the power transfer unit (PTU) / transfer case. The output shaft seal and case halves are common leak points. Low fluid levels lead to increased wear, whining noises, and eventual transfer case failure. Fluid changes are not part of the standard maintenance schedule, which allows undetected deterioration.

Common Symptoms

  • Fluid leak visible under center of vehicle
  • Whining or grinding noise from center drivetrain
  • AWD system warning light
  • Vibration at highway speed from worn transfer case components

How to Fix

Replace PTU output shaft seal and refill with Mazda FE-LS ATF. If internals are worn, PTU replacement is required. Proactive fluid changes every 30,000 miles significantly extend PTU life.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Valvoline FlexFill full synthetic API GL-5 SAE 75W-140 gear oil 902150
    OEMValvoline 902150

    First-generation 2007-2015 CX-9 AWD transfer-case lubricant matching Mazda's API GL-5 SAE 75W-140 specification Fitment/availability: Live direct product page identifies Valvoline 902150 as full-synthetic API GL-5 SAE 75W-140, $21.99, in…

    AutoZone
  • Genuine Mazda Long Life Hypoid Gear Oil SG1 0000-77-SG1-QT
    OEMMazda 0000-77-SG1-QT

    Second-generation 2016-2023 CX-9 AWD transfer-case oil specified by Mazda Fitment/availability: Live direct authorized-dealer page identifies genuine Mazda 0000-77-SG1-QT Long Life Hypoid Gear Oil SG1 at $25.39 with Add to Cart. Mazda's …

    MazdaStuff

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

  • TipChange PTU fluid every 30,000 miles even though Mazda does not list it in maintenance schedule
  • TipCheck for leaks at every oil change - early seal replacement saves the entire PTU. CX9Club.com AWD thread
Typical repair cost:$150 - $2,000

Research This Issue

Based on 1,600 owner reports

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Community Reported
High ConfidenceVerified1,600 owner reportsLast reported by owners Aug 2024Reviewed Feb 2026
get a full repair guide

What is the 2007-2015 Mazda CX-9 Water Pump and Coolant Crossover Pipe Leak (3.7L V6)?

The Ford-derived 3.7L Cyclone V6 in first-gen CX-9 models has a water pump mounted in the engine V that is driven by the timing chain. The pump seal and the coolant crossover pipe gaskets are common failure points, causing coolant to leak internally or externally. Because the pum… Repairs typically run $1,500-$3,500. Severity: high.

What is the 2018-2019 Mazda CX-9 Low-Pressure Fuel Pump Impeller Cracking and Stall (Denso Pump Recall)?

US recall 21V875 / Mazda 5321K includes certain 2018–2019 CX-9 vehicles built April 16–October 17, 2018 with affected Denso low-pressure fuel pumps. Mazda identifies 13,359 CX-9s across those two model years, not every CX-9. Impeller material can crack and deform until it interfe… Repairs typically run $0-$0. Severity: high.

What is the 2016-2020 Mazda CX-9 Cracked Cylinder Head Coolant Leak (2.5L Turbo SkyActiv PY-VPTS)?

Certain 2016–2020 CX-9 vehicles with the 2.5L turbo engine can leak coolant from cracks in the cylinder head near the exhaust-manifold mounting area. Mazda revised the head and exhaust-manifold gasket. Repair depends on diagnosis: a replacement cylinder head is a documented remed… Severity: high.

What is the 2007-2015 Mazda CX-9 Takata Passenger Airbag Inflator Rupture (Do Not Drive Advisory)?

Recalled Takata passenger-airbag inflators in certain 2007–2015 CX-9 vehicles can rupture during deployment, sending metal fragments into the cabin. Heat, humidity and temperature cycling can degrade the propellant. Mazda's August 2024 do-not-drive advisory covers unrepaired affe… Repairs typically run $0-$0. Severity: high.

What is the 2007-2014 Mazda CX-9 Front Lower Control Arm Ball Joint Corrosion and Separation?

Certain 2007–2014 CX-9 vehicles built October 24, 2006–December 28, 2013 are covered by recall 15V451 / Mazda 8515G. Water and road salt can enter the front lower ball-joint fitting, causing corrosion, looseness and a possible rattle. Continued operation can lead to separation of… Repairs typically run $0-$0. Severity: high.

What is the 2007-2023 Mazda CX-9 Transfer Case Fluid Leak (AWD Models)?

AWD-equipped CX-9 models develop fluid leaks from the power transfer unit (PTU) / transfer case. The output shaft seal and case halves are common leak points. Low fluid levels lead to increased wear, whining noises, and eventual transfer case failure. Fluid changes are not part o… Repairs typically run $150-$2,000. Severity: medium.

What is the 2016-2025 Mazda CX-9 Timing Chain Stretch and Rattle (2.5L Turbo SkyActiv)?

The second-generation CX-9 with the 2.5L turbocharged SkyActiv-G engine can develop timing chain stretch, producing a rattle or whine at startup that may persist for several seconds. Unlike the first-gen 3.7L V6 issue, the 2.5T chain stretch is typically less severe but still req… Repairs typically run $800-$2,000. Severity: medium.

What is the 2021 Mazda CX-9 Exhaust valve-seal oil consumption — certain 2021 CX-9 2.5T?

Mazda documents increased oil consumption from damaged exhaust valve seals, with low-oil warning and possible P250F:00. The CX-9 scope is certain 2021 2.5T vehicles: US/Canada 10.25-inch-display VINs JM3TC******509027–541070 (October 6, 2020–September 13, 2021), or Canada/Mexico… Severity: medium.

What is the 2007-2015 Mazda CX-9 A/C Evaporator Core Leak and Refrigerant Loss?

First-generation CX-9 models are prone to A/C evaporator core leaks, causing gradual refrigerant loss and reduced cooling performance. The evaporator develops pinhole leaks from internal corrosion, often accelerated by moisture and debris in the system. Symptoms worsen in hot wea… Repairs typically run $800-$1,800. Severity: medium.

What is the 2016-2020 Mazda CX-9 Mazda Connect CMU Freezing, Reboot Loop and Blank Screen?

The Connectivity Master Unit that runs Mazda Connect / MZD Connect on the CX-9 fails in a recognizable pattern: the screen freezes and stops responding to both the touchscreen and the commander knob, the system reboots repeatedly on its own, or it comes up blank with a long delay… Severity: medium.

What is the 2016-2023 Mazda CX-9 Power Liftgate Failure?

The power liftgate system fails to open, close, or hold position. Causes include liftgate strut motors wearing out, latch mechanism failure, and wiring harness damage in the rubber boot between body and liftgate. Cold weather exacerbates the issue as struts lose gas pressure. Repairs typically run $300-$900. Severity: low.