FaultScore

GMC Sierra vs Ford Mustang

Both cars' complete complaint records, side by side.

Read the totals carefully. NHTSA publishes no sales figures, so the car that sold more collects more complaints regardless of quality. The rows worth weighing are the proportions — the share of complaints that involved harm, and which part dominates.

Measure GMC Sierra Ford Mustang
Complaints on file 4,896 11,737
Model years covered 1976–2017 1965–2026
Worst model year 2000 2007
Best model year 2011 2025
Crashes reported 354 1,018
Fires reported 84 430
Injuries reported 189 576
Deaths reported 11 31
Most complained-about part Brakes Airbags
Share of complaints involving harm 13% 17.5%

GMC Sierra by year

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks

Brakes 1,507 30.8%
Steering 264 5.4%
Engine & Cooling 242 4.9%
Body & Structure 206 4.2%
Airbags 196 4.0%

Ford Mustang by year

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks

Airbags 2,403 20.5%
Engine & Cooling 1,641 14.0%
Electrical System 1,189 10.1%
Brakes 705 6.0%
Body & Structure 540 4.6%