FaultScore

Mercury Grand Marquis 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 Mercury Grand Marquis Ford Mustang
Complaints on file 4,953 11,737
Model years covered 1977–2011 1965–2026
Worst model year 2003 2007
Best model year 2011 2025
Crashes reported 395 1,018
Fires reported 277 430
Injuries reported 239 576
Deaths reported 15 31
Most complained-about part Lights Airbags
Share of complaints involving harm 18.7% 17.5%

Mercury Grand Marquis by year

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

What breaks

Lights 950 19.2%
Electrical System 556 11.2%
Engine & Cooling 535 10.8%
Brakes 369 7.5%
Steering 365 7.4%
Airbags 248 5.0%

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%