2005 Mercury Mountaineer Engine Problems
- Complaints
- 7about this part
- Share
- 9%of 82 total for the year
- Median mileage
- 115,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 7 complaints about the engine of the 2005 Mercury Mountaineer, 9% of the 82 complaints for this model year. Where a mileage was given, the median is 115,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“As I was driving the vehicle just died; all the warning lights came on and as I was losing speed I pulled over to curb the best I could. Restarted car and it seemed to run fine but happened again 20 minutes later. This has also happened 2 other times within the last 10,000 miles of driving.”
NHTSA complaint #10649043, filed 2014-10, 141,000 miles“The engine has shut off twice while driving using cruise control. The first time I was able to get to the side of road and restart it.. The second time I put it in neutral and restarted it while moving. I am afraid to use the cruise control now - if there had been oncoming traffic we would've had a head-on collision as I was on a corner and went into the other lane. When the engine shuts off, the power steering is gone leaving it very difficult to turn.”
NHTSA complaint #10609479, filed 2014-07, 105,000 miles“My transmission went only after 1 year of having car, spend ofver $3,000 for a new transmission and now the transmission is going again. This is unacceptable. I don't even drive that much.”
NHTSA complaint #10743667, filed 2015-07, 41,000 miles“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 internet for this generation of car. …”
NHTSA complaint #10936824, filed 2016-12, 90,000 miles“While driving 50 MPH vehicle stalled three times. Took it to a garage, was told it was necessary to have the vehicle when it stalled. Found eleven (11) similar complaints on your site! Perhaps there is some validity to the complaints. All parts of the vehicle related to safe driving were rendered useless. Sounds like a safety issue to me!”
NHTSA complaint #10781265, filed 2015-10, 128,000 milesRelated service bulletins
- 10109070Sep 21, 2016The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing electronic throttle bodies (ETBs). The ETC_ACT and ETC_DSD PIDs should not used to…
- 10045340Jul 10, 2012Ford/lincoln/mercury: if battery was disconnected or dead, vehicles/trucks may experience hard starts and engine idle rpm fluctuation and exhibit diagnostic trouble codes (dtcs)…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 3 | 23% |
| 2008 | 6 | 6% |
| 2007 | 5 | 6% |
| 2006 | 14 | 12% |
| 2005 | 7 | 9% |
| 2004 | 8 | 4% |
| 2003 | 1 | 1% |
| 2002 | 2 | 1% |
| 2001 | 1 | 5% |
| 2000 | 4 | 3% |
| 1998 | 2 | 1% |
Other parts of the 2005 Mercury Mountaineer
26 complaintsTransmission and drivetrain
19 complaintsVehicle speed control
13 complaintsBrakes
5 complaintsElectrical system
5 complaintsEngine cooling
5 complaintsSteering
5 complaintsOther or unknown
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsAir bags
3 complaintsFuel system
3 complaintsEquipment
2 complaints
← All problems reported for the 2005 Mercury Mountaineer
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology