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.
2004 Mercury Mountaineer engine problems
19 complaints (9% of all complaints for this car). Typical mileage when it fails: 70,000. 1 crash reported.
- owner complaints
- 19
- of this car's complaints
- 9%
- typical mileage
- 70,000
- crashes
- 1
- recalls
- 0
Which part fails
- Engine4
- Exhaust system1
At what mileage
Complaints by mileage at the time of the problem.
0k-25k
25k-50k
50k-75k
75k-100k
100k-125k
125k-150k
150k-175k
175k-200k
200k+
Mercury Mountaineer engine problems in other years
Specific symptoms reported on the 2004 Mercury Mountaineer engine
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
No recalls on record for this model year.
Related investigations
Spark plug ejection from cylinder head
On september 6, 2005, odi received a petition requesting that the agency investigate allegations of engine spark plug ejection in certain model year 1997 through 2004 ford vehicles with triton v-8 and v-10 engines.odi received a total of 474 non-duplicative complaints on the subject vehicles where the complainant, or the dealer repairing the vehicle, reported that a spark plug detached from the cylinder and/or ejected from the engine.as of december 8, 2005, odi is not aware of any allegations where the alleged defect resulted in a loss of vehicle control, a crash, an injury, or a fatality in any of the 10,319,810 subject vehicles.in addition, odi is aware of only two incidents where the vehicle stalled without restart.information contained in the odi consumer complaints and obtained from 72 telephone interviews with complainants showed the following:(1) 99% of the complaints were on my 1997 to 2002 subject vehicles.(2) most the complainants reported hearing a loud pop while driving or upon starting up the vehicle followed by a loud, repetitive clicking or popping sound.(3) many of the complainants reported that the popping sound was accompanied by some loss of vehicle power; however, in 99% of the incidents reported, the vehicle did not stall.in the very few incidents where the vehicle did stall, most vehicles could be restarted.(4) only a small percentage of the complainants cited that they smelled gas or a slight burning smell when the incident occurred.(5) in all but a very few incidents, vehicle damage was limited to the engine.in one incident, the complaint reported that the fuel rail was damaged and replaced after one of the spark plugs ejected from the engine; however, the complainant reported that the damage did not result in any type of fuel leak or fire.in another incident, the only incident where a fire was alleged, the complainant reported that no fluid leak was observed, but that a fire resulted after the spark plug had ejected from the engine and he had restarted the vehicle and driven to another location.none of the complainants reported any damage to the vehicle hood.(6) only two complainants reported that they observed what appeared to be some drops of fuel coming from the cylinder where the spark plug had failed or on the spark plug itself; however, each of these complainants reported that there was no smoke or flames as a result of his incident.as the petitioner noted, and odi?s analysis showed, it is possible for a spark plug to detach from the engine cylinder threads in the subject vehicles.however, odi?s analysis of 474 complaints describing such incidents found only a very few alleged any safety-related consequences.none of these showed any evidence of a serious safety consequence.given the large population and relatively long exposure time of the subject vehicles, the complaint analysis indicates that the risk to motor vehicle safety from the alleged defect is very low.in view of the foregoing, it is unlikely that the federal safety agency would issue an order for the notification and remedy of the alleged defect at the conclusion of the investigation requested in the petition.therefore, in view of the need to allocate and prioritize the federal safety agency?s limited resources to best accomplish the agency?s safety mission, the petition is denied.
DP05005
What 2004 Mercury Mountaineer owners say
Most recent owner complaints, unedited.
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.
Using cruise control going down a slight grade the engine died. This has happened multiple times in the last few months, so now I know to put the vehicle in netural while still moving and re-start the engine, then pull back down into drive. This isn't easy to do, so be careful not to put in reverse or park while trying to re-start the engine.
Tl* the contact owns a 2004 mercury mountaineer. The contact stated that the vehicle suddenly stalled. The vehicle was not diagnosed or repaired. The manufacturer was contacted about the failure. The failure mileage and VIN was not available.
04 mountaineer cluster gauge blacks out then meter gauge flickers. Waited for 10 min I'm parking lot then it comes on. Started to drive then about a mile into driving it shuts down. Mind you my SUV was still going but gauges shut down then my lights go off, then my windshield wipers go. By the grace of got I got home. While on road my engine was struggling. Help before that incident I had just replace thermostat housing because it cracked and I was loosing coolant.
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.
I purchased a 2004 mercury mountaineer first the rear liftgate plastic broke and there's a crack by the emblem on some occasions when put in reverse it makes a loud bang noise or when starting to accelerate but the biggest problem is that on the highway up to 50mph and over there seems to be a rattle under the engine and it gets louder when MPH is higher im not sure what it is but im really worried that it maybe a transmission problem and if this problem isn't recalled me and my family plus others are in really big danger its a family car so im starting to worry for my family and there safety these vehicles need to go on inspection and soon so these doesn't lead to any accidents.
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.
In april 2008 our transmission went. It was rebuilt with all ford parts. It's has gone again in july 2012. Ford will not do anything to help me. I would like a recall on this make and year and model . This is the 3rd transmission. Unacceptable!!!!!!! I want reimbursement for all 3 transmissions!
Shut off while driving lost power steering etc.
Questions about the 2004 Mercury Mountaineer engine
Does the 2004 Mercury Mountaineer have engine problems?
Owners have filed 19 complaints about the engine of the 2004 Mercury Mountaineer, 9% of all its complaints.
At what mileage do 2004 Mercury Mountaineer engine problems start?
The typical (median) mileage in owner complaints is 70,000 miles.
Was there a recall on the 2004 Mercury Mountaineer engine?
There is no recall for this problem on this model year.
What year does the Mercury Mountaineer have bad engine?
The Mercury Mountaineer model years with the most engine complaints are 2006 (56 complaints), 2002 (35 complaints) and 1998 (22 complaints).
Other 2004 Mercury Mountaineer problems
Body 79Transmission 64Acceleration 21Electrical 16Airbags 12Visibility 7Suspension 6Brakes 5Steering 5Locks 4Wheels 4Fuel system 2Driver assistance 1Lights 1Seat belts 1Tires 1
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