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Engine & cooling

Mercury Mountaineer Engine problems by year

214 complaints filed with NHTSA about the Mercury Mountaineer's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.

Engine complaints by model year

YearEngine complaintsCrashesInjuriesRecalls
20103000
20089000
20079000
200656010
200512000
200419100
200311000
200237020
20012000
20008000
199912000
199823110
199713000

Latest Mountaineer engine complaints

2008 Mercury MountaineerEngine & coolingFuel system

The contact owns a 2008 Mercury Mountaineer. The contact stated that the check engine warning light was illuminated. The contact stated the vehicle stalled while driving at an undisclosed speed. The contact stated that several attempts were needed to restart the vehicle to continue driving. The contact stated that the gear shifter intermittently failed to move to the intended position. The contact stated that there was an abnormal fuel odor inside the cabin of the vehicle, and the fuel level was lowered sooner than...

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normal. The vehicle was taken to the dealer to be diagnosed; however, the result was not provided. The contact stated that there was a code for an EVAP failure. The vehicle was not repaired. The vehicle was taken to another dealer, Peoria Ford (9130 W Bell Rd, Peoria, AZ 85382) however, the contact was not provided the cause for the failure. The vehicle was taken to an independent mechanic; however, the vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 200,000.

Filed Incident Engine and engine cooling · Fuel system, gasolineNHTSA 11684759
2006 Mercury MountaineerEngine & cooling

The contact owns a 2006 Mercury Mountaineer. The contact stated that her husband informed her that the vehicle had experienced an unknown radiator failure. The vehicle was taken to an independent mechanic, where the radiator was replaced; however, the failure reoccurred. The vehicle was repaired for a second time by an independent mechanic; however, the failure persisted. The local dealer was made aware of the failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 143,869.

Filed Incident Engine and engine coolingNHTSA 11498964
2005 Mercury MountaineerTransmission & drivetrainAcceleration & cruise controlEngine & cooling

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...

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,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 Incident Power train · Vehicle speed control · EngineNHTSA 11478634
2008 Mercury MountaineerTransmission & drivetrainEngine & cooling

Since I purchased in 2009, engine kills anytime, mostly when gas pedal not pressed. Pulling out of parking lots, sitting at red lights, or letting off gas on interstate, engine just kills. Sometimes feels like a jolt. I have to put the shift in neutral and restart the engine. Records of all visits for the problem at dealership. Never could solve problem, but too unsafe to donate to my grandson. If something were to happen to him because of a defect that was never found, I don't know what I'd do. Cannot check...

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transmission fluid level. Sealed. I do have some fluid stains on my driveway. For years I've reported to the dealership and specified the concern for safety but to no avail. It kills anytime. May not die for a week, or tomorrow, or even a month. No particular pattern. Feels like a transmission problem. If I'm sitting in a parking lot with motor running, sometimes it just kills. It's the shifting to neutral while driving on highways and streets to restart while moving I'm worried about. I've had several mechanics claim they fixed it but to no avail. Please give me some direction. All the shops I've gone to are reputable businesses. One mechanic said the electronic brain (computer box) might be causing and said to send it to mercury for recalculation. I don't know about that. Most of the read outs are epa related.

Filed Incident Power train · Unknown or other · EngineNHTSA 11365014
2008 Mercury MountaineerElectrical systemDriver assistanceEngine & cooling

Car when idle shuts off in middle of traffic locking break an steering wheel can cause accident happened to me in middle of traffic thank god I was close to emergency exit car shutoff not allowing to brake had to press emergency brake. *Tr

Filed Incident Electrical system · Electronic stability control (ESC) · EngineNHTSA 11323974
2007 Mercury MountaineerEngine & cooling

Car ran rough & hesitated/surged upon acceleration. Apparently this is a common ford problem involving premature spark plug break down in the ford triton engine see ford spark plug class action settlement. Shultz ford in nanuet ny diagnosed the problem as faulty plugs, there was also a risk of breaking plugs upon removal. I had them do the repairs at a cost of $788. Later I found that there was a settlement, however my car was not included even though it had the same engine as the cars/trucks/ suv's that were...

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included in the settlement. Ford customer service said there was nothing they could do re: reimbursing me for the repair expense as my suv was not included in the settlement. They suggested I file this complaint. Can I get some satisfaction?

Filed Incident EngineNHTSA 11123073
2006 Mercury MountaineerEngine & coolingFuel system

I purchased this vehicle recently with only 40,000 miles. The car keeps stalling or dying as you may say as I drive. It will be okay for a short period of time and then just die right on the highway! Once it dies once, the car will continue to do so over and over again until the engine has cooled down. I have the engine codes of p2104, p2111 and p2135 with a refere to p2101. I have brought it to several mechanics and paid well over $1,000 to fix this problem and it just continues. I am afraid my family may all...

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die! Were on 93 recently heading toward boston and my car died right at the intersection of 495. I had all my children in the car and it would not restart. I have fixed the fuel system (error code last time), had a complete tune up, and throttle sensor etc.

Filed Incident Unknown or other · Engine · Fuel / propulsion systemNHTSA 11022125
2005 Mercury MountaineerEngine & cooling

On two occasions the engine cut out while driving the car, all the engine warning lights came on. Once the car was safely off the road and placed in park it would start and continue to operate. The ford dealer said that there was not fault code in the computer, they could not duplicate the failure and could not find any fault in the engine system. Ford service representatives said I should go a different ford dealer and see if they could solve the problem. I find similar engine failures documented on the...

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internet for this generation of car. More current similar model are not reported to have this problem. Thus I assume ford found and fixed this problem. I asked them to tell me how they solved the problem, they said that was not possible. So, I have an otherwise good car which I can do use nor in good conscience sell to someone else. Please help! *Tr

Filed Incident EngineNHTSA 10936824
2006 Mercury MountaineerEngine & cooling

"Takata recall" engine always turns off while driving. I fixed it at 3 different workshops and still the same.

Filed Incident EngineNHTSA 10925107
2010 Mercury MountaineerEngine & coolingFuel system

At high speeds, the car stalls. It also stalls at stop lights. This happens repeatedly, and ford cannot figure out what is wrong with it.

Filed Incident Engine · Fuel / propulsion systemNHTSA 10876658
2004 Mercury MountaineerEngine & cooling

My vehicle shuts off while driving. No warning, loses power steering, loses power brakes. It will start righ back up once I shift into park. This happens at all different speeds and temperatures. I could have just got in the car or been driving for hours. Happens at 15mph and 60mph just the same. Have almost been hit from behind of several occasions when this has happened.

Filed Incident EngineNHTSA 10840317
2004 Mercury MountaineerEngine & coolingFuel system

This vehicle idles very low and stalls at various speeds. No warning is given engine just shuts down. Spark plugs have blown totally out from the engine several times.

Filed Incident Engine · Fuel / propulsion systemNHTSA 10820147

Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data

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