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Mazda · Known Issues

2013 Mazda CX-9 Problems: 4 Known Issues

2013 model year · 4,000+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 4,000+ owner reports, the 2013 Mazda CX-9 has 4 documented known issues, with 2 rated critical. The most serious are Timing Chain Stretch on 3.7L V6 ($1,500-$3,500 repair) and Water Pump and Coolant Crossover Pipe Leak (3.7L V6) ($1,500-$3,500 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 Cooling2
  • CX-9 Engine1
  • CX-9 Drivetrain1
  • Recalls3
  • FAQ
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In This Article

  • Cooling2
  • Engine1
  • Drivetrain1
  • Recalls3
  • FAQ

All 4 Known Issues

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On the 2007-2015 Mazda CX-9, 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

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence

On the 2007-2015 Mazda CX-9, 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

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence
Community reported
2,400 owners

On the 2007-2015 Mazda CX-9 3.7L V6 Duratec, 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

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerified2,400 owner reportsLast reported by owners May 2024Reviewed Feb 2026
Community reported
1,600 owners

On the 2007-2023 Mazda CX-9, 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

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerified1,600 owner reportsLast reported by owners Aug 2024Reviewed Feb 2026
NHTSA Recalls3 recalls

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

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Mazda North American Operations (Mazda) is recalling certain 2018 Mazda3, Mazda6, 2019 CX-3, 2018-2019 MX-5, CX-5, CX-9, and 2019-2020 Mazda2 vehicles. The impeller inside the low-pressure fuel pump may crack and deform, potentially causing the fuel pump to fail.

Campaign #21V87500012/11/2021

TIRES:TREAD/BELT

Mazda North American Operations (Mazda) is recalling certain 2019 CX-9 vehicles equipped with Sumitomo Falken ZIEX CT50 A/S tires, size P255/50R20 104V, having date code 1619. An incorrect rubber compound may have been used in the tire's manufacturing, allowing the tread to separate and detach.

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Other Mazda Models

Mazda CX-530Mazda CX-6027Mazda CX-5026Mazda MX-5 Miata22Mazda MX-621Mazda Mazda319

Frequently Asked Questions

What are the most common Mazda CX-9 problems?

According to Au7o's analysis of 4,000+ owner reports, the 2013 Mazda CX-9 has 4 documented issues. The most frequently reported are: Timing Chain Stretch on 3.7L V6, Water Pump and Coolant Crossover Pipe Leak (3.7L V6), Transfer Case Fluid Leak (AWD Models). Of these, 2 are rated critical and should be addressed promptly.

Is the Mazda CX-9 reliable?

The 2013 Mazda CX-9 has 4 known issues documented across 4,000+ owner reports. 2 issues are rated critical: Timing Chain Stretch on 3.7L V6 and Water Pump and Coolant Crossover Pipe Leak (3.7L V6). 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 $150 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 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.

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.

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 4,000+ owner reports, NHTSA recalls, TSBs, and automotive forums.

Campaign #19V770000
28/10/2019

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

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 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.