2016 Mazda CX-9 Engine cooling Problems
- Complaints
- 3about this part
- Share
- 3%of 107 total for the year
- Median mileage
- 120,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 2016 Mazda CX-9, 3% of the 107 complaints for this model year. Where a mileage was given, the median is 120,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owns a 2016 Mazda CX-9. The contact stated that while driving approximately 45-50 MPH, the vehicle suddenly lost motive power with white smoke coming from the front of the vehicle. The contact was able to get to the side of the road to inspect the vehicle and became aware that there was coolant splattered all over the engine compartment. The failure had occurred twice. The “WRENCH” symbol was displayed with the “Service Vehicle” message displayed. …”
NHTSA complaint #11687565, filed 2025-09, 148,000 miles“The contact owns a 2016 Mazda CX-9. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated, and the vehicle started shuddering and overheating. The vehicle was taken to an independent mechanic who diagnosed the vehicle and determined that the failure was related to a cracked head gasket. The vehicle was not repaired. The contact related the failure with the Technical Service Bulletin: 01-03/21; however, the vehicle was not included. The manufacturer was not notified of the failure. The failure mileage was approximately 92,000.”
NHTSA complaint #11596496, filed 2024-06, 92,000 miles“The contact owns a 2016 Mazda CX-9. The contact stated that while driving at an undisclosed speed, the vehicle stalled. Several unknown warning lights illuminated. The contact stated after the vehicle cooled off, the was able to be restarted. The contact checked under the vehicle and stated that there was coolant leaking on the ground. The vehicle was taken to an independent mechanic, where it was diagnosed with a coolant leak behind the engine. The vehicle was not repaired. The contact related the failure to Technical Service Bulletin: 01-002/23. …”
NHTSA complaint #11591593, filed 2024-05Related service bulletins
- 10251387Feb 12, 2024Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as…
- 10244679Oct 11, 2023If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by…
- 10238663Jun 5, 2023Some vehicles may exhibit oil leakage from the drive belt auto tensioner and rattling noises from the engine compartment. This may be caused by insufficient sealing at the drive…
- 10238695Jun 1, 2023Some customers may complain of a lack of power under heavy load without any warning lights or DTCs. This concern may be due to a loose or detached hood weatherstrip, which can…
- 10237216May 24, 2023If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by…
- 10232269Feb 10, 2023Some vehicles may have coolant leaks at the cylinder head around the exhaust manifold (as shown below). There may be cracks at the stud bolt hole (1) or at the outside of the…
- 10232266Feb 3, 2023Some customers may complain about a poor acceleration and rough idling or the CHECK ENGINE light ON with DTC P0301:00, P0302:00, P0303:00, P0304:00.NOTE: Only turbo engines are…
- 10230865Jan 23, 2023When servicing SKYACTIV engine vehicles requiring to replace the Oil Galley Plug and Crush Washer, order the required part numbers below. These parts are not listed in GEPC and…
- 10230890Jan 19, 2023Some vehicles may have coolant leaks at the cylinder head around the exhaust manifold (as shown below). There may be cracks at the stud bolt hole or at the outside of the exhaust…
- 10230888Jan 4, 2023Some customers may complain about a poor acceleration and rough idling or the CHECK ENGINE light ON with DTC P030X:00 (only turbo engines are applicable; non-turbo engines are…
Engine cooling: other model years
Other parts of the 2016 Mazda CX-9
68 complaintsElectrical system
14 complaintsBrakes
11 complaintsTransmission and drivetrain
9 complaintsFuel system
8 complaintsOther or unknown
6 complaintsBody and structure
4 complaintsSeats
3 complaintsVehicle speed control
3 complaintsWheels
3 complaintsAir bags
2 complaintsForward collision avoidance
2 complaints
← All problems reported for the 2016 Mazda CX-9
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology