Mercury Mountaineer loss of power problems

Filed Dec 27, 2023 · Steering · AZ

Aftermarket rack and pinion system re-manufactured by Detroit Axel began leaking fluid and caused a loss of power steering within 3 months of purchase. A second unit was installed and after about a year had the exact same failure as the first unit. Also resulting in the loss of power steering. It is my contention that Detroit Axel is not capable of re-manufacturing to a satisfactory safety standard. I believe they should be investigated and perhaps subject to a product recall. I pray nobody has yet been killed by their ineptitude!

Filed Aug 10, 2022 · Acceleration, Engine · PA

started losing power ,did not want to go pas 30 miles per hr ,then it ramed up and came to a stop with no acceleration ,i shut it off then start it again and was able to get home at a low rate of speed while continuing to have these problems, another day while far away from home the engine rammed up again minimizing my speed as the transmission was slipping and not go fast then my O/D over drive went on flashing a light ,while the engine kept steady at 20-30 miles per hour while accelerating increasing no speed ,now my SUV will not run wright, it will kick into gear at times constantly and cause problems driving safely ,this is a common problem I'm hearing and reading in the internet with the ford/ mercury mountaineer the manufactory does not want to accept responsibility with this problem ..... this is clear a RECALL ISSUE that needs to be addressed before someone gets killed on the highway by getting rammed by a semi-truck which it almost happened to me !!!! a multi-million dollar law suit is in order if they do not acknowledge and fix this problem

Filed Nov 8, 2018 · Acceleration · 136,200 miles · CT

I purchased a used 2005 mercury mountaineer last month, with 135,400 miles, while using cruise control and traveling approximately 35 MPH, the road went from level to a very slight downgrade. The car then just shut off after audible warning bell was heard. Noticed dashboard lights were all lit and battery gage was normal. I lost power steering, brakes and oil pressure. After pulling safely to the side of the road, I rested for 30 seconds before restarting the car, which subsequently operated normally. After taking it in for an oil change and safety check, I went on a 450 mile weekend trip and had no issues, restricting cruise control to highway speeds. The other day, I was traveling on a different stretch of level road in my town while using cruise control at approx. 35 MPH. After heading into a slight downgrade, I again heard the warning bell, followed by engine shut off. A "check gage" light came on and I lost power steering, oil pressure and brakes. This time, I gently shifted the car into neutral, and while coasting at 15-20 MPH I turned the ignition off before restarting without issue. The car has subsequently operated normally, but I have not engaged the cruise control at any speed.

Filed Apr 2, 2015 · Acceleration · 133,000 miles · WI

I had the cruise control set on 30 MPH driving in a residential area. Without warning, all the lights on my dash flashed, and my vehicle lost all power. Very scary. No more power steering, no power brakes, while coasting through a neighborhood. I put the car in neutral, turned the key off, back on again, and put the car back in drive. That fixed the problem. This is very scary and dangerous!! This is the third time it has happened to me. I am afraid to use the cruise control on my car now :(

Filed Nov 24, 2014 · Transmission · 99,000 miles · TX

Tl* the contact owns a 2006 mercury mountaineer. The contact stated that while driving 70 MPH, the vehicle lost power without warning. The vehicle was merged to the side of the road where it was restarted. However, the vehicle failed to accelerate past 35 MPH. The vehicle was taken to an independent mechanic where the technician diagnosed that the power train needed to be replaced. The manufacturer was made aware of the issue. The failure mileage was 99,000. The VIN was not available.

Filed Jul 5, 2013 · Engine, Steering · 70,000 miles · SD

Tl* the contact owns a 2004 mercury mountaineer. The contact stated that while driving approximately 40 MPH, the vehicle stalled and there was a sudden loss of power steering. The contact mentioned that the check engine warning light illuminated. The vehicle was taken to a private mechanic where the failure was unable to be replicated. The manufacturer was notified of the failure. The vehicle was not repaired. The approximate failure mileage was 70,000 and the current mileage was 110,000.

Filed Jan 19, 2013 · Acceleration, Electrical · 130,629 miles · MD

Engine stalls when activating cruise control which results in hazardous driving situation due to loss of power steering and brakes. Have to pull over to side of road, put the vehicle in park and restart. Starts every time. Has repeated 3 times. This is a serious flaw in the ford electrical computer design to result a failure mode that stalls the vehicle engine while under speed.

Filed Jan 16, 2012 · Engine · 93,000 miles · CT

Shut off while driving lost power steering etc.

Filed Feb 16, 2011 · Engine · 80,000 miles · MD

2006 mercury mountaineer driving on the highway, suddenly the coolant temperature went up crazily and the engine sounded horrible and lost power. Fortunately stopped by the roadside and found the radiator was leaking and coolant is almost empty. Searched around the web and found that for 4.0 engine from ford and mercury, this is pretty normal problem due to a design defect. People are changing radiator every year. Never heard such ridiculous thing that nowadays the radiator last so short time. It should last life time of the car. Ford apparently knew it, however, they only announced a tsb in 2009 when most of the warranties were gonna expire. They should issue a recall. This is a design problem and it poses life threatening risks. I guess they just don't care about customers. The customers need to repair out of they own pockets, which support ford's chain dealers service departments. Well, sounds a good plan for them. Well, the customers are not stupid. They are change to japanese cars, which have far less problems. I will never a ford?mercury car and would be glad to see them go bankruptcy.

Filed Jun 17, 2010 · Electrical · 87,000 miles · CA

Tl* the contact owns a 2003 mercury mountaineer. While driving less than 40 MPH, the dashboard illuminated and the vehicle lost all power. The contact had not spoken with the manufacturer nor the dealer for repairs, diagnostic testing nor to report the failure. The current and failure mileages were 87,700.