There are 1 owner-reported fuel system complaints for the 2019 Mazda CX-9in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact’s husband owns a 2019 Mazda CX-9. The contact stated that while the vehicle was at the dealer for a diagnostic test, she was informed that the head gasket was cracked, and fluids were leaking into the engine. The vehicle was not repaired due to the cost. Additionally, the message “Excessive Engine Temperature - Engine Output Will be Limited" was displayed. The vehicle was not included in NHTSA Campaign Number: 21V875000 (Fuel System, Gasoline). The manufacturer was made aware of the failure. The failure mileage was approximately 62,756.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026