BMW 750LI vs Mercury Mariner

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	BMW 750LI	Mercury Mariner
Complaints on file	696	1,722
Model years covered	2006–2021	2005–2011
Worst model year	2006	2008
Best model year	2009	2007
Crashes reported	18	48
Fires reported	20	4
Injuries reported	7	32
Deaths reported	0	0
Most complained-about part	Transmission & Drivetrain	Steering
Share of complaints involving harm	6.5%	4.9%

BMW 750LI by year

300 121 103 15 49 39 40 11 9 3 1 5

06 07 08 09 10 11 12 13 14 15 16 21

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

What breaks

Transmission & Drivetrain 140 20.1%

Engine & Cooling 94 13.5%

Airbags 76 10.9%

Electrical System 72 10.3%

Doors, Latches & Locks 66 9.5%

Body & Structure 60 8.6%

Brakes 38 5.5%

Other & Unspecified 26 3.7%

Mercury Mariner by year

100 91 40 554 422 394 121

05 06 07 08 09 10 11

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

What breaks

Steering 560 32.5%

Transmission & Drivetrain 235 13.6%

Engine & Cooling 193 11.2%

Acceleration & Cruise Control 180 10.5%

Fuel & Propulsion 147 8.5%

Electrical System 105 6.1%

Brakes 67 3.9%

Other & Unspecified 57 3.3%