NHTSA Complaint #11490188 — 2018 MAZDA CX-9

ENGINE issue reported to NHTSA

Check any vehicle history by VIN - Free vehicle history report

Complaint Details

ODI Number	11490188
Vehicle	2018 MAZDA CX-9
Component	ENGINE
Date of Incident	October 9, 2022
Date Filed	October 20, 2022
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	PA

Consumer Description

I have a 2018 Mazda CX-9 with about 66,000 miles. I noticed a coolant leak when my SUV sat in my driveway. It was there each night after driving the SUV. I took the vehicle to a Mazda dealer who stated that the coolant leak is from a cracked cylinder head. A cylinder head should not crack in 4 years and only 66,000 miles. This is a known Mazda issue for this year make and model.

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...