2018 Mazda CX-9 Engine Problems
NHTSA lists 78 engine complaints for the 2018 Mazda CX-9, 61% of all complaints for the year, with a median mileage at failure of 72,000. The dominant pattern is cracked cylinder heads causing coolant loss and overheating. No related recall is listed for this issue.
- Engine complaints
- 78
- 61% of 128
- Crashes reported
- 0
- Fires reported
- 0
- Injuries reported
- 0
- Median mileage
- 72,000 mi
- Related recalls
- 0
Typical engine symptoms owners report
- Owners report cracked cylinder heads that leak coolant and trigger overheating warnings, often discovered after noticing an antifreeze smell or dropping coolant level.
- Several drivers describe the temperature gauge climbing to dangerous levels while driving, forcing them to pull over to avoid further engine damage.
- Some owners say dealers confirmed the cracked cylinder head and needed to replace part or all of the engine.
- One complaint describes sudden unintended acceleration at a stop, requiring the driver to shift into park and shut off the engine to stop the vehicle.
- A separate report describes loud rattling and gear slippage tied to a failing water pump bearing found by the dealer.
When 2018 Mazda CX-9 engine complaints were filed
First complaint Jul 17, 2019, latest Sep 17, 2026.
Engine recalls for the 2018 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 on the 2018 Mazda CX-9?
- NHTSA lists 78 engine complaints for the 2018 CX-9, which is 61% of all 128 complaints filed for that model year.
- What is the most reported engine issue on the 2018 CX-9?
- The most frequently described pattern is a cracked cylinder head that leaks coolant and causes overheating, sometimes leading to engine replacement.
- At what mileage do 2018 CX-9 engine problems typically show up?
- NHTSA data shows a median mileage at failure of 72,000 miles for engine-related complaints on this model year.
- Is there a recall for the 2018 Mazda CX-9 engine?
- No related recall is listed in NHTSA data for the engine complaints on the 2018 CX-9.
- Have the engine problems caused crashes or fires?
- NHTSA records zero crashes and zero fires among the reported engine complaints for the 2018 CX-9.