Vehicle Data Hub

2021 Mazda CX-9 engine problems

21 complaints about engine have been filed for the 2021 Mazda CX-9, which is 39% of all its NHTSA complaints. It is the most reported problem area for this model year.

At a glance

Complaints
21 39% of this year's complaints
Crashes and fires
1 and 0
Injuries and deaths
0 and 0

Source: NHTSA owner complaints

What the data shows

These complaints mention 1 crash.

What owners wrote

The vehicle was parked stationary in the driveway with the engine running for 3-5 minutes with the A/C on. The vehicle then accelerated forward into my garage causing damage. Once I entered the vehicle, both the dash and shifter displayed park. Current TCU system internal failures have been reported from the pulling of data from Mazda.

August 2026 Crash

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.

Reported at 53,186 miles, August 2023

Engine problems in other years

Engine problems across all Mazda models