Engine complaints and recalls from NHTSA
Summary
The 2018 Mazda Mazda6 has 21 NHTSA engine complaints and 1 engine-related recall.
21
Complaints
1
Recalls
0
Injuries Reported
Data source: National Highway Traffic Safety Administration (NHTSA) · Last updated May 8, 2026
19V497000
ENGINE
Mazda North American Operations (Mazda) is recalling certain 2018-2019 CX-5, Mazda6, and 2019 Mazda3 vehicles. A software error in the powertrain con...
| Date ↓ | Component | Summary |
|---|---|---|
| Apr 25, 2026 | ENGINE | Crack in Cylinder Head of engine. Mazda has been sued about this and have issued recalls on turbo en... |
| Apr 4, 2026 | ENGINE | Car had a coolant leak due to cracked cylinder head that was defective from the factory it was fixed... |
| Feb 13, 2026 | ENGINE | Per Mazda inspection, the back side of cylinder head #3 has an oil leak which is leaking onto the ex... |
| Oct 11, 2025 | ENGINE | Cracked cylinder head causing oil leak and possible coolant leak. This is a known issue with this ye... |
| Jun 1, 2025 | ENGINE | My cylinder head is leaking coolant. There is a well known and well documented issue with these cyli... |
| Apr 18, 2025 | ENGINE | Bought used with 47k miles. Two weeks later, took it to my mechanic for an inspection, they found a ... |
| Dec 22, 2024 | ENGINE | Driving in traffic and the engine temperature warning appeared on dash. Dealer has confirmed there i... |
| Nov 18, 2024 | ENGINE | Cracked cylinder head near the exhaust manifold. Created a large oil leak. Oil on the exhaust is ... |
| Sep 11, 2024 | ENGINE | Cracked Cylinder Head. At 50,400 miles. This is far too common of a problem for such a new car with ... |
| Jul 8, 2024 | ENGINE | The contact owns a 2018 Mazda 6. The contact stated that while merging onto a freeway the vehicle di... |
| Jul 8, 2024 | ENGINE | At less than 95,000 miles, the car suddenly started overheating. Coolant level was fine, maybe ever... |
| Apr 3, 2024 | ENGINE | Start engine when cold and it knocks/ taps from the valve cover very loud, found a tab for valve lif... |
| Mar 22, 2024 | ENGINE | Mazda has a huge issue with there HLAs hydraulic lash adjusters. I've driven the car for 60k+ miles ... |
| Mar 7, 2024 | ENGINE | At 65,000 miles and on time maintenance a head gasket blew. |
| Dec 4, 2023 | ENGINE | The engine has developed an oil leak that is a known manufacturing defect of Mazda 2.5 litre engines... |
| Dec 4, 2023 | ENGINE | Cracked Head , not caused by anything I did. |
| Sep 29, 2023 | ENGINE | Coolant leaking from head, informed by dealer the cylinder head is cracked and the entire engine nee... |
| May 14, 2023 | ENGINE | I was driving my car, it overheated. I took it in and was told it needs a new engine. I was told i... |
| Apr 27, 2023 | ENGINE | Just noticed my coolant was leaking underneath my car and i went to mazda to check and it came out b... |
| Apr 16, 2023 | ENGINE | Due to design issues, the engine cylinder head became cracked after normal everyday usage. Coolant b... |