Mercury Mountaineer owners have reported 384 power train related problems since 1996. Table 1 shows the 35 most common power train problems. The number one most common problem is related to the vehicle's automatic transmission (101 problems). The second most common problem is related to the vehicle's power train (75 problems). For details of each of the problem category, use the links in the table.
This vehicle is has a power train problem from day one with the 5r55s/w transmission and awd transfer case. I purchased this vehicle where it stranded my family over 200 miles from home and it's a non running car. Read details...
The truck bearing keep going out the spark plugs overloaded and I can’t accelerate at times when I’m driving it slows down then starts back up Read details...
2003 Mercury Mountaineer recalls I have had to change the intake manifold, ignition coils, I'm having a gas smells now, transmission thumps hard when going into first gear, sounds like my rear end is about to fall out, my front seat is electric and doesn't move, the o/d light comes on, check Read details...
Rear differential is filling with water pass the fill plug. This is a garage kept car and never off road nor dirven in deep water. First time discovered at 22000 miles and the dealer replace the pinion seal and oil, but could not find the cause. Read details...
The transmission is slipping between gears, reving way higher than normal to shift and won't go into overdrive. My research of the problem shows this is a common issue on Ford and Mercury vehicles in this year range. Read details...