Misfire / rough idle: most reported vehicles
Model years whose owners most often describe misfiring cylinders or rough idling in NHTSA complaints. Last verified Aug 7, 2026.
Counts are unique NHTSA complaints whose narrative matches this symptom’s keywords. Automatic classification is approximate, and raw totals favor vehicles that sold in large numbers.
265 model years have misfire / rough idle reports in total. Browse all vehicles →