NHTSA Complaint #11583106 — 2018 MAZDA CX-9

ENGINE issue reported to NHTSA

Check any vehicle history by VIN - Free vehicle history report

Complaint Details

ODI Number	11583106
Vehicle	2018 MAZDA CX-9
Component	ENGINE
Date of Incident	April 2, 2024
Date Filed	April 15, 2024
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	KY

Consumer Description

Car started leaking coolant, and running rough / stalling. Eventually overheated due to lack of coolant. Mazda dealer reports Cylinder Head crack as the root cause of the issue. Car has 106K miles - and seems to have the same problem as referenced in NHTSA 10232269 [XXX] ) Mazda has decided to decline to offer any financial assistance in the repair. Replacement cost for just the cylinder head (not a complete engine) was quoted by a Mazda dealership to be $6800 - $7200. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Related Complaints for the 2018 MAZDA CX-9

Other ENGINE Complaints

#11716057 — February 5, 2026 — Here the facts, bought a car out of state (Illinois) from Iowa with 130,131 miles on Sept 12th 2025, Mazda CX9, the ...

#11681066 — August 16, 2025 — Cracked cylinder head/leaking coolant.

#11674928 — July 21, 2025 — . In January 2024, I purchased a used 2018 Mazda CX-9. The vehicle ran well until [XXX], when I discovered an engine ...

#11657829 — April 30, 2025 — Our Mazda CX-9, having roughly 86,000 miles, had catastrophic engine failure while driving. This is caused by coolant...

#11654683 — April 15, 2025 — coolant leaking from engine block cracked cylinder head

Recent Complaints for the 2018 MAZDA CX-9

#11719629 — SEATS — February 21, 2026 — The adjustable rails holding the rear left seat in place no longer latch. It is available for inspection. This is the...

#11713860 — ELECTRICAL SYSTEM — January 28, 2026 — Passenger seat heater either had a grounding issue or shorted out, causing to seat to start smoldering and catching f...

#11694595 — VISIBILITY/WIPER — October 20, 2025 — Passenger side sun visor will not stay in place. Cannot lock it in up position, which means it droops. Causing sight ...

#11686751 — BACK OVER PREVENTION: WARNINGS — September 11, 2025 — [XXX] 2018 MAZDA CX-9 GRAND TOURING 89014 MILES Date: 9/11/2025 To: Mazda North American Operations Attn: Customer...

#11686751 — ELECTRICAL SYSTEM — September 11, 2025 — [XXX] 2018 MAZDA CX-9 GRAND TOURING 89014 MILES Date: 9/11/2025 To: Mazda North American Operations Attn: Customer...