2021 Mazda CX-9 Engine Problems
Engine complaints make up 21 of 39 total complaints (54%) for the 2021 Mazda CX-9, with a median mileage at failure of 51,093 miles. No engine-related recall has been issued for this model year.
- Engine complaints
- 21
- 54% of 39
- Crashes reported
- 1
- Fires reported
- 0
- Injuries reported
- 0
- Median mileage
- 51,093 mi
- Related recalls
- 0
Typical engine symptoms owners report
- Owners report the low oil warning light coming on repeatedly, often every 3,000 to 4,000 miles, with the engine found to be about a quart low each time.
- Multiple owners describe excessive oil consumption tied to what dealers identified as defective valve stem seals allowing oil to leak into the combustion chambers.
- One owner reported the engine losing power and stalling without warning while driving at or above 60 MPH, requiring several restart attempts before it would run normally again.
- One owner described the vehicle unexpectedly accelerating forward while parked and running with the A/C on, causing a crash into a garage, which the owner linked to a reported TCU system failure.
- Some owners noted the oil consumption issue appeared soon after purchase, with low-oil warnings occurring well before the vehicle's first scheduled oil change.
When 2021 Mazda CX-9 engine complaints were filed
First complaint Jun 9, 2022, latest Sep 12, 2026.
Engine recalls for the 2021 Mazda CX-9
No safety recalls on record for this model year.
Engine complaints by CX-9 model year
Raw complaint counts per model year; newer years have had less time to accumulate complaints.
Frequently asked questions
- How common are engine problems in the 2021 Mazda CX-9?
- NHTSA lists 21 engine-related complaints out of 39 total complaints for the 2021 CX-9, meaning engine issues account for 54% of all complaints filed for this model year.
- Is there a recall for the 2021 Mazda CX-9 engine oil consumption issue?
- No related recalls are listed in NHTSA data for this problem area on the 2021 CX-9, even though owners report excessive oil consumption as a recurring issue.
- At what mileage do 2021 CX-9 engine problems typically show up?
- The median mileage at failure reported to NHTSA for engine complaints on the 2021 CX-9 is 51,093 miles.
- Were there any crashes linked to engine complaints on the 2021 CX-9?
- NHTSA data shows 1 crash and 0 fires or injuries among the engine complaints filed for the 2021 CX-9.
- How does the 2021 CX-9 compare to other years for engine complaints?
- Engine complaints made up 54% of all complaints for 2021, higher than 2020's 26% but lower than 2017's 70% and 2018's 61%, based on NHTSA complaint data across CX-9 model years.