Most common 2007 Mercury Mountaineer problems
Share of the 81 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercury Mountaineer complaints by model year
Best Mountaineer years: 2009, 2010, 2001. Years to avoid: 2002, 1997, 1998, 2004, 1999. Compare all years →
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2007 Mercury Mountaineer:
Tire valve cracking
On October 14, 2008, odi opened pe08-060 to investigate allegations of cracked and leaking snap-in tire valves in model year (my) 2007 vehicles manufactured by Ford motor company.the valves were supplied to Ford by topseal auto-parts, a subsidiary of the shanghai baolong automotive corporation in china.valves made by topseal for aftermarket sale were the subject of two recent safety recalls by tech international…
What 2007 Mercury Mountaineer owners say
Seats all 26 →
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 turn off the seat function still haven't figured that out yet
The drivers seat, will, without warning, while driving on the interstate, automatically start moving backwards to it's default position. Sometimes the interior light will come on simultaneously. In a panic, so far, I have been able to stop the backward movement by grabbing the seat position button and forcing it to move back up to the preset position where I have been able to get my feet back on the pedals. This has occurred multiple times while driving full speed on interstates, on side streets and frontage roads and everytime without warning. One time, while sitting at a stop sign, I could not catch it quickly enough and it moved so far back that my feet could not reach any of the pedals! Luckily that time I was sitting still. This has been happening for three years.
Transmission & drivetrain all 25 →
The contact owns a 2007 Mercury Mountaineer. The contact stated that after shifting the transmission from park(P) to reverse(R), the vehicle failed to respond. The contact removed and reinserted the fob key in the ignition to correct the failure. The vehicle was taken to an independent mechanic, who diagnosed that an unknown transmission part needed to be replaced. The vehicle was not repaired. The mechanic instructed the contact to pull the park release lever each time to shift the vehicle out of park (P). The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 78,000.
My 2007 Mercury Mountaineer never had any problems until recently, thought it was the transmission because of the way it drove. Took it to the mechanic and got transmission fluid put in but the problems remained the same and was told the transmission was fine. My thermostat housing unit was leaking (this is very common with these cars and very dangerous, needs immediate attention!) and had caused very expensive wiring issues. Almost acts exactly like the transmission is going out - RPM's are way too high, the vehicle would not accelerate in the middle of city traffic, the car jumped at a stoplight and caused me to hit the car in front of me, and it doesn't shift properly. Problems occurred out of nowhere and are too dangerous to be ignored but very expensive to be fixed. Its very common and should be recalled before someone gets seriously injured!!!!
Electrical system
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 turn off the seat function still haven't figured that out yet
When driving the vehicle at any speed the seat moves all the way back and the interior lights come on. This also happens when you brake or go over a bump. This is very dangerous to someone of my size because when the seat goes all the way back I can no longer touch the pedals. This is happening very often and I have googled it and I can see that a lot of other people who own this year make and model are having the same problems with their vehicle. I have taken it to several mechanics and Ford dealers and nobody seems to be able to figure out what is wrong with it.
2007 Mercury Mountaineer engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 4.6L 8-cyl | 6-speed automatic | RWD | 13 / 20 / 16 |
| 4.0L 6-cyl | 5-speed automatic | RWD | 13 / 19 / 15 |
| 4.0L 6-cyl | 5-speed automatic | 4WD/AWD | 13 / 18 / 15 |
| 4.6L 8-cyl | 6-speed automatic | 4WD/AWD | 13 / 18 / 15 |
EPA ratings. Class: SUV.
Frequently asked questions
Is the 2007 Mercury Mountaineer a good car?
Based on 81 owner complaints filed with NHTSA, the 2007 Mountaineer rates average: 39% fewer complaints than a typical year of the Mountaineer at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2007 Mercury Mountaineer?
The seats — 26 complaints, 32% of all complaints for this model year, most often about front assembly › power adjust. Next are the transmission & drivetrain (25) and electrical system (16).
How many recalls does the 2007 Mercury Mountaineer have?
NHTSA lists no recalls for the 2007 Mercury Mountaineer. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Mercury Mountaineer?
The best years by complaints, compared at the same age, are 2009, 2010 and 2001. Years to avoid or approach with caution: 2002, 1997, 1998, 2004 and 1999. See the full Mercury Mountaineer years comparison.
At what mileage do 2007 Mercury Mountaineer problems happen?
The median mileage reported in complaints is about 75,000 miles; 28% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.