Mercury Mountaineer Electrical System Problems
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).
- 182electrical system complaints
- —median miles at failure
- 7mention a crash
- 5mention an injury
- 1related recalls
- 36%of reports with a speed happened at 50+ mph
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.
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
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2010 Mountaineer | 1 | 8% | 109,000 |
| 2009 Mountaineer | 1 | 17% | 71,000 |
| 2008 Mountaineer | 39 | 41% | 65,000 |
| 2007 Mountaineer | 16 | 20% | 91,305 |
| 2006 Mountaineer | 9 | 8% | 75,000 |
| 2005 Mountaineer | 5 | 6% | 98,581 |
| 2004 Mountaineer | 16 | 8% | 82,700 |
| 2003 Mountaineer | 11 | 7% | 87,000 |
| 2002 Mountaineer | 19 | 5% | 60,000 |
| 2000 Mountaineer | 19 | 15% | 118,000 |
| 1999 Mountaineer | 10 | 7% | 56,000 |
| 1998 Mountaineer | 21 | 9% | 94,280 |
| 1997 Mountaineer | 15 | 5% | 62,502 |
When owners reported it
Related recalls (1)
Electrical system:wiring:fuses and circuit breakers
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 Iâve tried Combat the issue with keeping the lights off on the interior and thought maybe I could…
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…
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…
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…
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

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
- Power Train problems (385)
- Tires problems (327)
- Structure problems (283)
- Vehicle Speed Control problems (215)
- Engine and Engine Cooling problems (161)
- Seats problems (125)
See all Mercury Mountaineer problems.