Chevrolet Trailblazer EXT vs Mercury Mountaineer

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	Chevrolet Trailblazer EXT	Mercury Mountaineer
Complaints on file	1,070	2,646
Model years covered	2002–2006	1996–2010
Worst model year	2003	1997
Best model year	2002	2010
Crashes reported	23	191
Fires reported	20	91
Injuries reported	21	148
Deaths reported	0	5
Most complained-about part	Fuel & Propulsion	Transmission & Drivetrain
Share of complaints involving harm	6%	16.4%

Chevrolet Trailblazer EXT by year

120 406 306 238

02 03 04 06

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

What breaks

Fuel & Propulsion 297 27.8%

Electrical System 281 26.3%

Transmission & Drivetrain 97 9.1%

Lights 60 5.6%

Engine & Cooling 59 5.5%

Windows, Mirrors & Wipers 56 5.2%

Body & Structure 47 4.4%

Doors, Latches & Locks 24 2.2%

Mercury Mountaineer by year

3 399 298 182 164 32 504 220 271 113 153 119 156 8 24

96 97 98 99 00 01 02 03 04 05 06 07 08 09 10

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

What breaks

Transmission & Drivetrain 399 15.1%

Tires 364 13.8%

Body & Structure 298 11.3%

Acceleration & Cruise Control 221 8.4%

Engine & Cooling 217 8.2%

Electrical System 190 7.2%

Brakes 142 5.4%

Seats 127 4.8%