NHTSA Complaint #11549523 — 2018 MAZDA CX-9
ENGINE issue reported to NHTSA
Complaint Details
| ODI Number | 11549523 |
| Vehicle | 2018 MAZDA CX-9 |
| Component | ENGINE |
| Date of Incident | |
| Date Filed | |
| Mileage | N/A miles |
| Crash | No |
| Fire | No |
| Injuries | 0 |
| Deaths | 0 |
| Vehicle Towed | No |
| State | MS |
Consumer Description
As I was driving 26 mile trip to work I noticed a red light illuminated on dash indicating the temp was about 240-260. I pulled into the parking lot immediately turned car off. After work (8 hour shift) drove home temp stayed at 200-210. The next morning I took it to the mechanic I’ve used for years. He did a visual detailed inspection finding that the water or antifreeze in the radiator was low. The antifreeze in the over flow tank was about an inch or so above the “L” line. He said there may have been an air pocket in it, a leak, water pump or thermostat going out. Watch the fluid levels daily, if the lower again take it to the dealership where I purchased it (4 months ago with 106K miles on it). I do have a 3 year or 30,000 mile warranty through the dealership. 4 days later I was very observant watching the temperature gauge. It went up to 240 briefly, so I got home and had my ex-husband check it. Both the radiator and the overflow tank were bone dry. Topped off radiator with antifreeze and the overflow tank to the “F” line. Car had cooled and right before topping fluid started. There is no noticeable sign of a leak (smell, white smoke from exhaust, visible puddles of anything on the motor or the ground where I’ve parked. Today is Thursday 10/12 and I can’t get an appointment with dealership until Tuesday. I’ve been reading a lot online about this being a very repetitive issue. In some cases new engine replacement required. Mazda is well aware of not a few but NUMEROUS issues and complaints, a recall is needed for this situation. Right is right and fair is fair!!
Related Complaints for the 2018 MAZDA CX-9
Other ENGINE Complaints
#11716057
Here the facts, bought a car out of state (Illinois) from Iowa with 130,131 miles on Sept 12th 2025, Mazda CX9, the ...
#11681066
Cracked cylinder head/leaking coolant.
#11674928
. In January 2024, I purchased a used 2018 Mazda CX-9. The vehicle ran well until [XXX], when I discovered an engine ...
#11657829
Our Mazda CX-9, having roughly 86,000 miles, had catastrophic engine failure while driving. This is caused by coolant...
#11654683
coolant leaking from engine block cracked cylinder head
Recent Complaints for the 2018 MAZDA CX-9
#11719629
SEATS
The adjustable rails holding the rear left seat in place no longer latch. It is available for inspection. This is the...
#11713860
ELECTRICAL SYSTEM
Passenger seat heater either had a grounding issue or shorted out, causing to seat to start smoldering and catching f...
#11694595
VISIBILITY/WIPER
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
[XXX] 2018 MAZDA CX-9 GRAND TOURING 89014 MILES Date: 9/11/2025 To: Mazda North American Operations Attn: Customer...
#11686751
ELECTRICAL SYSTEM
[XXX] 2018 MAZDA CX-9 GRAND TOURING 89014 MILES Date: 9/11/2025 To: Mazda North American Operations Attn: Customer...