FaultScore

Mazda CX-50 vs Buick Rainier

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 Mazda CX-50 Buick Rainier
Complaints on file 212 525
Model years covered 2023–2026 2003–2007
Worst model year 2023 2004
Best model year 2026 2007
Crashes reported 29 33
Fires reported 3 24
Injuries reported 16 14
Deaths reported 0 0
Most complained-about part Driver Assist & Collision Avoidance Electrical System
Share of complaints involving harm 22.6% 13.5%

Mazda CX-50 by year

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

What breaks

Brakes 26 12.3%
Transmission & Drivetrain 20 9.4%
Electrical System 19 9.0%
Other & Unspecified 15 7.1%
Body & Structure 14 6.6%
Suspension 14 6.6%
Engine & Cooling 8 3.8%

Buick Rainier by year

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

What breaks

Electrical System 147 28.0%
Lights 57 10.9%
Suspension 25 4.8%
Engine & Cooling 22 4.2%
Airbags 22 4.2%
Windows, Mirrors & Wipers 22 4.2%