Home · 2021 Mazda Cx-90 Phev · Complaints

What 35 owners told NHTSA about the 2021 Mazda Cx-90 Phev

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 (6)Engine (18)Brakes (4)Driver assistance (3)Airbags (2)Backup camera & sensors (2)Transmission & drivetrain (2)Electrical system (1)Speed control (1)Steering (1)Suspension (1)

1 of 35 complaints match · Speed control · clear filters

Aug 14, 2024Speed controlEngine

The contact owns a 2021 Mazda CX-9. The contact stated that while accelerating quickly and entering the highway, there was no motive power to the vehicle. While crossing the highway in the right lane, driving at 65 MPH, the vehicle in front moved over; there was a parked vehicle. The contact was able to stop the vehicle before causing a crash. The driver was starting to accelerate, but there was no motive power when the accelerator pedal was depressed. The smart brake system malfunction message was displayed. There were no warning lights illuminated. The contact called the local dealer, who scheduled an appointment. The vehicle was not diagnosed or repaired. The manufacturer was contacted and informed the contact to have the vehicle diagnosed. The failure mileage was approximately 53,186.

NHTSA ODI 11608556

Working with the data? Download all 35 complaints as CSV · fetched from NHTSA July 18, 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 2021 Mazda Cx-90 Phev verdict →