NHTSA ODI #11644041

2021 Mazda Mazda3 Complaint

Engine

Filed February 21, 2025 · Incident date February 14, 2025

Vehicle
2021 Mazda Mazda3
Component(s)
Engine
Complaint filed
February 21, 2025
Date of incident
February 14, 2025
Reported VIN
JM1BPABL5M1

Owner's description

The thermostat malfunctioned on this vehicle, resulting in the thermostat remaining open and providing excess coolant to the engine, which in turn damaged internal components of the engine (compromises safety), decreased fuel economy, increased emissions (compromised safety), and decreased the life of the engine within the vehicle. It is available for inspection upon request. The vehicle has been inspected by an independent mechanic and will be inspected by the Mazda dealership in 7 days. There were no prior warnings until the engine malfunction notice appeared, the vehicle began to make jolts and stuttering sounds, and the temperature gauge within the vehicle failed to rise to optimal range. As this occurred while the vehicle was in use (safety concern), though I was pushing the gas there would be delayed response due to improper temperature, which increased the risk for an accident to occur.

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Data sourced from the NHTSA Complaints database. Complaints are submitted by vehicle owners and have not been independently verified.