2021 Mazda CX-9: True Cost, Problems & Verdict
37 NHTSA owner complaints · 1 recalls · data-computed verdict. No opinions — public data only.
Reviewed by the MotorJury data desk · 2 sources · Last updated 2026-08-20
37 NHTSA owner complaints · 1 recalls · data-computed verdict. No opinions — public data only.
Complaints per year on the road: 7.4
Verbatim reports filed with the United States safety regulator (NHTSA) by owners of this exact model year. Public record.
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.
Check engine light comes on and error P0303 comes on. Had an independent mechanic do the following and after each one, error P0303 still came on 1. Swap the ignition coils from 2 to 3 2. Swap spark plugs from 2 to 3 3. Swapped injectors 4. Compression test 5. Leak down test 6. Changed the spark plug, coil and injectors 7. Looked for vacuum leaks. Mechanic believes that it is related to the cracked cylinder head in t…
Backup camera shows three to four feet before red collision line is not accurate causing severe damage to my garage door.
What the community is saying right now.
| Campaign | Component | Summary |
|---|---|---|
| 21V750000 | 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 … |
Re-priced automatically from your country's retail fuel, electricity and parts indices — change country in the bar at the top. Estimates; see methodology.
The most-reported issue in NHTSA complaint data is Engine (20 complaints in our indexed sample).
Our data verdict is BUY with a reliability score of 87/100, computed from 37 NHTSA complaints and 1 recall campaigns. See the verdict card for the top reasons.
Yes — NHTSA lists 1 recall campaign(s) for the 2021 Mazda CX-9, 0 of them touching fire, crash or stall risk, the most recent recorded 27/09/2021. Check this car's VIN at nhtsa.gov/recalls before you buy.
Fuel, maintenance band and depreciation — computed from public data in 10 seconds.
Open the true-cost calculatorComplaints & recalls: NHTSA ·
Fuel economy: EPA fueleconomy.gov ·
Scoring: our published methodology.
Maintenance bands are industry-average estimates (AAA Your Driving Costs, CarMD index) — labeled estimates, not measurements.
Last updated: 2026-08-20.