AI Damage2009 Mercury Mountaineer: common problems
Owners of the 2009 Mercury Mountaineer filed 6 complaints with NHTSA, most often about seats and steering. Details by component below, with sources.
Key figures
- Owner complaints
- 6
What fails most often
- 1 Seats 33% of all complaints
- 2 Steering 33% of all complaints
- 3 Electrical system 17% of all complaints
- 4 Service brakes 17% of all complaints
- 5 Vehicle speed control 17% of all complaints
- Seats: 2 complaints (33% of all).
- Steering: 2 complaints (33% of all).
- Electrical system: 1 complaints (17% of all).
- Service brakes: 1 complaints (17% of all).
- Vehicle speed control: 1 complaints (17% 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 6 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 | 2 | 0 | 0 |
| Steering | 2 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Service brakes | 1 | 0 | 0 |
| Vehicle speed control | 1 | 0 | 0 |
| Other | 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.
The contact stated that the Roll Stability Control (RSC) warning light was illuminated. The contact took the vehicle to the local dealer, where it was diagnosed with needing the Roll Stability Control (RSC) to be replaced. The vehicle was repaired but continued to experience the failure.
In addition, the air bag warning indicator illuminated when the failure occurred. The failure recurred on several occasions. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 45,000.
Have a 2009 mercury mountaineer with 71,000 miles. In the past 10 days, have had four incidents where, while driving, the driver's side power front seat has suddenly reverted to the easy exit position. We bought this car used with 22,000 miles. Have had the car for four years.
The contact stated that while driving 60 mph, the vehicle stalled and the warning lights illuminated. The contact had to shift to park and restart vehicle to resolve the failure. The vehicle was taken to the dealer who determined that the throttle position sensor had failed. The throttle position sensor was replaced.
Tl contact owns a 2009 mercury mountaineer. The contact stated that when he rocked the steering wheel back and forth it made a popping noise. The contact stated that the rack and pinion caused the failure to occur.
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 13,278 of 36,656 model years in the NHTSA data (top 36% most complained about).
On average one model year of the Mountaineer has 125 complaints (16 years in the data). This year has 6, below average.
What to check before buying
- Seats. Occupant sensor, power adjustment, seat mounts.
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
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 200896 sources
- Mountaineer 201013 sources
- Mountaineer 99999 sources
Questions and answers
What are the most common problems with the 2009 Mercury Mountaineer?
Owner complaints to NHTSA most often mention: seats, steering, electrical system. Total complaints: 6. The most frequent symptoms in complaint texts: warning lights, check engine (33%), airbag warning light (17%), stalls while driving (17%).
How many service bulletins (TSB) were issued for the 2009 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 2009 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 2009 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.