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ProblemsByVin Index / 2008-MERCURY-MOUNTAINEER / COMPLAINTS
Full complaint record · NHTSA

2008 Mercury Mountaineer owner complaints

96 complaints filed with NHTSA on this vehicle . Showing the 300 most recent — grouped by category for scanning.

electrical 10 complaints shown

37 total in this category · severe · avg repair $850 · see electrical cluster analysis →
12/17/2014 85,000 mi ODI #10664865.0

While driving between 50 - 65 miles per hour the electric driver seat will move back into the open door park position and the inside lights will come on. Has happened multiple times since october 2014. There is no set pattern, it is completely random. *tr

12/13/2014 109,000 mi ODI #10664083.0

I was driving my vehicle and a light came on that said check the charging system, the car's electrical system completely crashed and all the electrical power to the car died and it literally turned off while I was driving it in the middle of the street. Now even with a replaced battery and alternator it will only start with a jump and continues to say the charging system needs to be checked. This is extremely dangerous. What if I were driving on the highway and all of a sudden (with no reduction of speed) the vehicle just turned off and stopped. No electric meant no powersteering, no ABS, no air bag sensors etc... Very dangerous. I have checked several blogs and sites and I am finding a number of people are having the same charging system issue. I would like to return the company to

12/12/2012 73,000 mi ODI #10488631.0

Purchased a used 2008 mercury mountaineer almost a year ago, in approx oct 2012 the driver's seat started moving back and forth while driving. When the seat moved back it was almost so far back I couldn't hold onto steering wheel or keep foot on brake pedal. Took vehicle to mccoy mills Ford and they could not duplicate occurrence. Since that date this has happened multiple times and I figured out it has something to do with the ignition switch. If the car gets any minor jolt as in riding on rough street or going over speed bump, ignition apparently shift which triggers something in the sensor and off you go. Most recent occurrence was on 12/11/2012 while driving through a local walmart parking lot; slowly went over speed bump and seat started moving on its own. Since the occurrences

12/07/2017 90,000 mi ODI #11052947.0

After approximately 90,000 miles the dome lights turned on and automatic seats move back while driving. This issue persists and often occurs several times. There are several complaints of this issue found online. It is not due to a heavy key chain as I only have the fob and key attacked. This is a safety issue as the seats pull the driver away from the pedals and steering wheel. Investigate! Recall!

11/28/2016 135,000 mi ODI #10928199.0

While driving vehicle my seat will decide to move on its own and pull me away from the pedals also the dome light comes on and it does this all the time very dangerous now my car will not start at all due to the ignition switch I believe. *tr

11/25/2019 198,000 mi ODI #11282163.0

Driver seat electrical adjustment will move itself backwards while car is moving. There is no pattern to this problem, it is random.

11/09/2016 70,000 mi ODI #10925119.0

While driving the driver seat automatically goes back and the interior light comes on...this is gonna cause an accident cuz when the seat goes back the memory key for the seat position doesnt work until u turn the ignition off and back on again, once the seat goes back I cant reach the break or peddle. This is dangerous situation and isee im not the only one having this issue? It happens several times a day..soemtime when u first start it but mostly while driving down the road

10/25/2013 65,000 mi ODI #10549519.0

The issue started out while we were driving; the seat would move to the easy exit feature and the dome lights would come on as though the key was removed from the ignition. It's now more frequent and happens when you put the key in the ignition. Turning the key slightly will put in back into the driving position. This is a serious driving hazard as you're moved very far away from the steering wheel as well as the brake and gas pedals. Sadly, it will take a deadly accident occurring for this to be considered a recall. *tr

10/23/2017 112,580 mi ODI #11035952.0

While driving down the road, the seat will suddenly move backwards to the "open door" position, as though the key had been pulled out of the ignition. This creates a very dangerous situation, especially for people with short legs, as one can no longer reach the gas pedal or brake. Slightly "wiggling" the key or ignition switch will usually get the seat to move back to the preset driving position. When this happens, the interior lights also go on, and turn off when the seat moves back into position. This seems to happen at all different speeds, and it seems most events happen after the car hits a bump, but not always. There have been times when it just seems to happen without anything to set it off. It also can happen when the vehicle is first started up, or just as you start to shut t

10/23/2013 29,000 mi ODI #10549236.0

There is a recurring problem that the seat will automatically go into the "easy exit" position. This is not a problem for me as I drive with the seat as far back as possible, but this is a huge safety concern for my wife. Why hasn't this been recalled yet? This seems to be a common problem in this make and model. God forbid the electrical problem worsens and causes a fire. *tr

other 7 complaints shown

12/31/2014 58,000 mi ODI #10669249.0

While driving if on bumpy roads the seats will return to the open door position and inter lights come on. Making it hard to reach pedals. *js

12/06/2013 72,000 mi ODI #10555055.0

Tl* the contact owns a 2008 mercury mountaineer. The contact stated that the front driver's seat reclined independently as the dome light illuminated. The manufacturer was made aware of the failure. The vehicle was not repaired. The VIN was not available. The approximate failure mileage was 72,000.

11/26/2013 80,000 mi ODI #10553814.0

Tl* the contact owns a 2008 mercury mountaineer. The contact stated that while driving 30 MPH, the driver's side seat independently engaged into the easy exit position as the interior lights flashed on and off. The vehicle was taken to the dealer for inspection and repairs. The ignition and seat switch were replaced, however the failure recurred. The manufacturer was not made aware of the failure. The vehicle was not repaired. The VIN was not available. The approximate failure mileage was 80,000.

11/26/2011 26,000 mi ODI #10437300.0

While driving at 55 MPH, the dome light went on and the power seat started to move back. I was unable to reach the brakes and this nearly resulted in a serious accident with my 2 kids in the car. I have owned 2 other mountaineers and never had this problem before. This is a true safety issue. This has happened again over thanksgiving 2011 and I will be calling Ford asap. *tr

11/25/2011 25,000 mi ODI #10437270.0

Tl* the contact owns a 2008 mercury mountaineer. The contact stated that she applied the brake pedal while driving approximately 50 MPH and the front drivers seat began to slide backward. The vehicle was taken to the dealer for a diagnostic test. The technicians stated that the ignition would have to be replaced because it was affecting the electronic feature on the seat and causing the failure. The vehicle was not repaired. The approximate failure mileage was 25,000. The VIN was not available.

11/16/2010 ODI #10365945.0

My 2008 mercury mountaineer is having a strong transmission kick when down shifting and a squicking noise which I think is coming from the break and my dealer kept on reporting back to me as "unable to duplicate" the problem. This SUV were bought as brand new and I feel like that the car is going to break apart or loose my break everytime I feel those rattles. Everytime I would go to my dealer for a service, I would always mention about the problem which they can't fix! *tr

10/21/2016 135,000 mi ODI #10917907.0

Tl* the contact owns a 2008 mercury mountaineer. While driving 30 MPH, the front driver's seat automatically retracted backwards. The failure recurred on numerous occasions. Also, the interior lighting illuminated on its own. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 135,000.

brakes 1 complaint shown

12/16/2008 17,000 mi ODI #10252031.0

While coming up to a red light, the vehicle started making a clunking noise and the brake pedal went to the floor when I tried to stop for the red light. I also lost power steering. Luckily, I finally got the SUV to stop after I pumped the brakes and I was able to avoid hitting the car in front of me. I was close to my home so I slowly drove to my house using the emergency brake to stop if necessary. I contacted mercury who towed the SUV to their shop the next day on the 15th of december. They have had the vehicle all day on the 15th and 16th and told me that I could pick it up on the 17th. They couldn't, however. Find anything wrong with the vehicle and said the computers say everything is fine. They claim there is nothing wrong and are giving me the vehicle back. *tr

engine 1 complaint shown

4 total in this category · moderate · avg repair $3,100 · see engine cluster analysis →
12/14/2010 ODI #10370562.0

Tl* the contact owns a 2008 mercury mountaineer. The contact stated that while driving approximately 75 MPH, the vehicle would stall and the wrench warning light would illuminate. The vehicle was able to be restarted after a several attempts. The failure would occur on an intermittent basis. The vehicle was inspected by a dealer and they were unable to diagnose the failure. The vehicle was not repaired. The failure mileage was unknown. Updated 06/24/11

steering 1 complaint shown

3 total in this category · moderate · avg repair $700 · see steering cluster analysis →
10/21/2021 141,782 mi ODI #11437666.0

The contact owns a 2008 Mercury Mountaineer. The contact stated that after parking the vehicle, he was unable to remove the key from the ignition. 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. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was approximately 141,782.

Showing 300 of 96 total complaints. The full federal record is available at nhtsa.gov/vehicle/2008/Mercury/Mountaineer#complaints.
Source: National Highway Traffic Safety Administration (NHTSA) owner complaint database. Last synced 2026-06-28. Complaints are owner-submitted and unverified — the existence of a complaint is not proof of a defect, but a pattern of complaints around the same component is a signal worth weighing. Verify any specific filing at nhtsa.gov.
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