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What 35 owners told NHTSA about the 2015 Mazda Cx-90 Mhev

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (35)Crash / fire / injury (2)Engine (17)Brakes (3)Transmission & drivetrain (3)Airbags (2)Lights (2)Visibility & wipers (2)Electrical system (1)Electronic Stability Control (esc) (1)Engine & cooling (1)Fuel system (1)

1 of 35 complaints match · Engine & cooling · clear filters

Feb 1, 2024Engine & cooling

The contact owns a 2015 Mazda CX9. The contact stated that while driving at approximately 55 MPH, the vehicle shut off. The contact stated that the engine was overheating. The contact restarted the vehicle, and the vehicle stalled again. The vehicle continued to coast into a parking lot. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the water pump, timing chain, cam phaser, timing chain tensioner, and an engine replacement were needed. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 124,000.

NHTSA ODI 11569248

Working with the data? Download all 35 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2015 Mazda Cx-90 Mhev verdict →