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Mazda · Known Issues

2025 Mazda CX-9 Problems: 1 Known Issue

2025 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 Mazda CX-9 has 1 documented issue. None of the listed issues is rated critical; this is not a complete reliability assessment. Across all issues with published estimates, repair costs range from $800 to $2,000. DIY maintenance guides at au7o.io.

In This Article

  • CX-9 Engine1
  • Recalls1
  • FAQ
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In This Article

  • Engine1
  • Recalls1
  • FAQ

All 1 Known Issue

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On the 2016-2025 Mazda CX-9, 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
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

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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 research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 Mazda CX-9 has 1 documented issue. The documented issue is: Timing Chain Stretch and Rattle (2.5L Turbo SkyActiv). None are rated critical, but regular maintenance is recommended.

Is the Mazda CX-9 reliable?

The 2025 Mazda CX-9 has 1 known issue compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. None of the matching records is rated critical; this is not a complete reliability assessment. 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 $800 to $2,000, 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 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.

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 compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.