AI Damage2008 Mercury Mountaineer: common problems
Owners of the 2008 Mercury Mountaineer filed 96 complaints with NHTSA, most often about seats and electrical system. Details by component below, with sources.
Key figures
- Owner complaints
- 96
- involving a crash
- 3
What fails most often
- 1 Seats 56% of all complaints
- 2 Electrical system 41% of all complaints
- 3 Powertrain 9% of all complaints
- 4 Engine 6% of all complaints
- 5 Exterior lighting 6% of all complaints
- 6 Seat belts 4% of all complaints
- 7 Service brakes 4% of all complaints
- 8 Engine and cooling 3% of all complaints
- Seats: 54 complaints (56% of all), 1 of them with a crash reported by the owner.
- Electrical system: 39 complaints (41% of all), 2 of them with a crash reported by the owner.
- Powertrain: 9 complaints (9% of all), 1 of them with a crash reported by the owner.
- Engine: 6 complaints (6% of all).
- Exterior lighting: 6 complaints (6% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 4 L · petrol · 6 cyl
- 4.6 L · petrol · 8 cyl
- automatic, 5-speed
- automatic, 6-speed
Drive: RWD, AWD
Symptoms owners describe
How many of the 96 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Seats | 54 | 1 | 0 |
| Electrical system | 39 | 2 | 0 |
| Powertrain | 9 | 1 | 0 |
| Engine | 6 | 0 | 0 |
| Exterior lighting | 6 | 0 | 0 |
| Seat belts | 4 | 0 | 0 |
| Service brakes | 4 | 0 | 0 |
| Engine and cooling | 3 | 0 | 0 |
| Steering | 3 | 0 | 0 |
| Structure | 3 | 0 | 0 |
| Visibility | 3 | 0 | 0 |
| Fuel system | 2 | 0 | 0 |
| Vehicle speed control | 2 | 0 | 0 |
| Air bags | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
While in park and turned off, the vehicle rolled forward and collided with another vehicle. There were no warning indicators illuminated or injuries. A police report was filed. The vehicle was taken to a dealer, but was not diagnosed. The manufacturer was made aware of the failure. The failure mileage was 70,500.
The contact stated that the check engine warning light was illuminated. The contact stated the vehicle stalled while driving at an undisclosed speed. The contact stated that several attempts were needed to restart the vehicle to continue driving.
The contact stated no warning light was illuminated. The contact stated he was able to remove the key after disconnecting the battery. The contact took the vehicle to an independent mechanic and was informed that the steering column lock module needed to be replaced. The vehicle was not diagnosed or repaired.
On a 2008 mercury mountaineer the driver side seat belt will not stay hooked in it comes lose.
Seat belt on the drivers side fails to say hooked into the seat belt clip-in
At 28000 miles the transmission started shifting erratic, the dealer reprogrammed the ecm and covered up the problem until the warrant ended and the battery failed at which time the car reverted back to default and continued to buck and jerk until the car reached highway speed.
When I put the vehicle in reverse, the vehicle jerks very hard. Also when I drive for more than 6 to 7 miles at highway speeds, a tire pressure sensor comes on.
Power steering problem intermittent steering seems to change from manual steering when turning making very difficult to steer
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 3,666 of 36,656 model years in the NHTSA data (top 10% most complained about).
On average one model year of the Mountaineer has 125 complaints (16 years in the data). This year has 96, below average.
What to check before buying
- Seats. Occupant sensor, power adjustment, seat mounts.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Other years of this model
- Mountaineer 19963 sources
- Mountaineer 1997328 sources
- Mountaineer 1998236 sources
- Mountaineer 1999151 sources
- Mountaineer 2000123 sources
- Mountaineer 200122 sources
- Mountaineer 2002372 sources
- Mountaineer 2003152 sources
- Mountaineer 2004210 sources
- Mountaineer 200582 sources
- Mountaineer 2006117 sources
- Mountaineer 200781 sources
- Mountaineer 20096 sources
- Mountaineer 201013 sources
- Mountaineer 99999 sources
Questions and answers
What are the most common problems with the 2008 Mercury Mountaineer?
Owner complaints to NHTSA most often mention: seats, electrical system, powertrain. Total complaints: 96. The most frequent symptoms in complaint texts: warning lights, check engine (23%), stalls while driving (5%), seat belts (4%).
How many service bulletins (TSB) were issued for the 2008 Mercury Mountaineer?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2008 Mercury Mountaineer from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2008 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.