NHTSA Complaint #11705314 — 2018 MAZDA CX-5

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11705314
Vehicle	2018 MAZDA CX-5
Component	ENGINE
Date of Incident	November 14, 2025
Date Filed	December 16, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	NY

Consumer Description

Mazda has inspected the car and determined that there is a crack in the cylinder head. This is apparently a known defect in 2018-2021 Mazdas with 2.5L engines, including, without limitation, the 2018 Mazda CX-5. The cracked cylinder head has caused leaking coolant, which can drain into the engine and create serious safety issues. Mazda is aware of the issue, however, they are claiming that it is not covered by warranty.

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