Least Reliable Used Cars by Class

These generations carry the lowest reliability scores in their class. The score runs from 1 to 10 and compares engine, transmission and drivetrain complaints with similar vehicles: others in the same class, at the same age, in the same years, counted per vehicle built. The class average is 7.0. Each is listed only because its last three years score low as well. Up to 10 are listed in each class, one generation per model.

The score counts complaints owners filed with NHTSA, which is different from the share of vehicles that fail. Each vehicle's page lists the recalls, investigations and warranty extensions on record. How the score is worked out

Based on 1,203,787 NHTSA complaints across 52 brands. Updated October 2026.