Mercury Mountaineer Electrical System Problems

Source: NHTSA · Updated Sep 3, 2025 · 182 complaints analyzed

Owners have filed 182 complaints with NHTSA about electrical system problems on the Mercury Mountaineer across 13 model years. The 2008 model year has the most (39). The words owners use most often: “ignition switch” (9% of reports).

What owners describe

Phrases that appear unusually often in these complaints compared with complaints about other cars.

  • Ignition switch: mentioned in 17 of 182 complaints (9%)
  • Easy exit: mentioned in 10 of 182 complaints (5%)
  • Seat moves: mentioned in 10 of 182 complaints (5%)

At what mileage do electrical system problems happen?

Based on 127 complaints that reported the odometer reading.

Under 10k miles6 · 5%
10k–25k miles10 · 8%
25k–50k miles12 · 9%
50k–75k miles30 · 24%
75k–100k miles23 · 18%
100k–150k miles32 · 25%
150k+ miles14 · 11%

How serious are the reports?

Of 182 complaints, 7 mention a crash, 25 a fire, 5 an injury.

Mercury Mountaineer electrical system complaints by model year

Peak: 2008, with 39 complaints
1997: 151997151998: 211998211999: 101999102000: 192000192002: 192002192003: 112003112004: 162004162005: 5200552006: 9200692007: 162007162008: 392008392009: 1200912010: 120101

n = 182 complaints · Source: NHTSA

Model yearElectrical System complaintsShare of that yearMedian miles
2010 Mountaineer18%109,000
2009 Mountaineer117%71,000
2008 Mountaineer3941%65,000
2007 Mountaineer1620%91,305
2006 Mountaineer98%75,000
2005 Mountaineer56%98,581
2004 Mountaineer168%82,700
2003 Mountaineer117%87,000
2002 Mountaineer195%60,000
2000 Mountaineer1915%118,000
1999 Mountaineer107%56,000
1998 Mountaineer219%94,280
1997 Mountaineer155%62,502

When owners reported it

Peak: 2014, with 24 complaints
1997: 219971998: 11999: 419992000: 92001: 520012002: 52003: 820032004: 62005: 1020052006: 72007: 520072008: 72009: 820092010: 82011: 620112012: 132013: 820132014: 24242015: 820152016: 142017: 920172018: 42019: 520192020: 32022: 220222023: 1

n = 182 complaints · Source: NHTSA

Related recalls (1)

Electrical system:wiring:fuses and circuit breakersMar 7, 2000 · NHTSA campaign 00V072000 · 208,903 vehicles

Model years: 1999, 2000

Problem: Vehicle description: multi-purpose vehicles equipped with 4.0l engines and all-time 4-wheel drive (a4wd) powertrains. The generic electronic module (gem) could experience a condition referred to as "lock-up" in which the gem controlled electronic functions (e.g., front windshield wipers, interior lights, 4x4 system, etc.) could not be turned on or, in some cases if the function is on, could not be turned off.

Risk: An inoperative windshield wiper system could affect driver visibility, increasing the risk of a crash.

Fix: Dealers will install a resistor in the gem circuit.

What owners report

Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.

It happens every time I drive this vehicle. The ignition is lose, so the key jiggles and if their is too much bumping or shaking the key slightly moves and the seat and interior lights come on now I’ve tried Combat the issue with keeping the lights off on the interior and thought maybe I could…

Received Jan 19, 2023 · NHTSA complaint 11502548

Body : to much rust, corrosion, on rear of truck other failure or detachment of exterior body like rear gate frame components, and other structural components that may present a safety hazard. Electrical :Â electrical systems and items such asa wiring and cable on or inside the door, ignition…

Received Jun 18, 2022 · NHTSA complaint 11469915

The contact owns a 2010 Mercury Mountaineer. The contact stated that the check engine warning light was illuminated. The vehicle was taken to an independent mechanic to be diagnosed. The contact was informed that the computer had provided an incorrect error code. The vehicle was also diagnosed by…

Received Jun 7, 2022 · NHTSA complaint 11468066

Tl* the contact owns a 2008 mercury mountaineer. The contact stated that the instrument panel lighting system was inoperable. The vehicle was taken to an independent mechanic who diagnosed the vehicle however, was unable to determine the cause of the failure. The instrument panel lights were…

Received May 27, 2020 · NHTSA complaint 11326133

Car when idle shuts off in middle of traffic locking break an steering wheel can cause accident happened to me in middle of traffic thank god i was close to emergency exit car shutoff not allowing to brake had to press emergency brake. *tr

Received May 9, 2020 · NHTSA complaint 11323974
Mercury Mountaineer
2002-2005 Mercury Mountaineer photographed in USA.. Representative photo; appearance varies by model year. Photo: IFCAR, Public domain, via Wikimedia Commons.

Frequently asked questions

Do all Mercury Mountaineers have electrical system problems?

No. NHTSA has 182 owner complaints about electrical system for the Mercury Mountaineer. Complaint data shows that the problem is reported, not how many of all cars sold are affected.

Was there a recall on the Mercury Mountaineer electrical system?

Yes: 1 safety recall list electrical system. Check your VIN on NHTSA.gov to see whether the fix was done on your car.

What do owners say about electrical system problems on the Mercury Mountaineer?

The most frequent phrase is “ignition switch”, in 17 of 182 complaints, followed by “easy exit” (10).

Other Mercury Mountaineer problems

See all Mercury Mountaineer problems.