FaultScore

Worst years for a Mercury Mariner

Owners have filed 1,722 complaints about the Mercury Mariner with NHTSA across model years 2005 to 2011. More of them are about the steering than anything else.

Avoid

2008 Mercury Mariner

554 complaints — the highest FaultScore of any year, mostly steering.

Cleanest on record

2007 Mercury Mariner

40 complaints — the lowest FaultScore of the graded years.

Every Mercury Mariner year, graded

The grade compares each year against the rest of this model's own run — never against another car. Click any bar or row to open that year's report.

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded
Year Grade Complaints Crashes Fires Median miles Most reported
2011 A 121 3 0 49,000 Fuel & Propulsion
2010 C 394 4 4 58,849 Acceleration & Cruise Control
2009 C 422 11 0 93,456 Steering
2008 C 554 11 0 104,689 Steering
2007 A 40 1 0 73,000 Transmission & Drivetrain
2006 B 91 8 0 87,000 Acceleration & Cruise Control
2005 C 100 10 0 58,568 Engine & Cooling

What breaks on a Mercury Mariner

Across every model year on file. Follow a row for that part's complaints and the year it was worst.

Steering 560 32.5%

Worst in 2008

Worst in 2008

Engine & Cooling 193 11.2%

Worst in 2010

Worst in 2010

Worst in 2010

Worst in 2010

Brakes 67 3.9%

Worst in 2008

Worst in 2008

Airbags 31 1.8%

Worst in 2005

Suspension 25 1.5%

Worst in 2006

Worst in 2010

Body & Structure 24 1.4%

Worst in 2010

Stability & Traction Control 17 1.0%

Worst in 2008

Tires 14 0.8%

Worst in 2005

Exactly what failed on a Mercury Mariner

The named sub-assemblies behind those complaints, across every model year.

Automatic Transmission 26 32.9%
Body 18 22.8%
Glass, Side/Rear 7 8.9%
Accelerator Pedal 6 7.6%
Column 5 6.3%
Ignition 5 6.3%
Engine 4 5.1%
Frontal 4 5.1%
Electric Power Assist System 2 2.5%
Side/Window 2 2.5%

Complaints filed over time

Every complaint about every Mercury Mariner, by the month it reached NHTSA.

Aug 2005 peak 82 Aug 2026

Mercury Mariner problems by state

Where owners filed from. Heavier states are usually just bigger markets, but a part that fails in heat or salt shows up here first.

Compare the Mercury Mariner

Side by side on complaint history. Remember that raw totals track how many were sold as much as how good they were.