Engine and Engine Cooling problems — most reported vehicles
97,994 owner complaints filed with NHTSA name the engine and engine cooling component group. Below are the model years with the most reports. Last verified Aug 7, 2026.
Counts are unique NHTSA complaints naming this component for each model year. Complaints are unverified owner reports, and raw totals favor high-volume sellers — a popular model can rank high simply because more of them are on the road.