2004 Mercury Mountaineer Engine Problems
- Complaints
- 8about this part
- Share
- 4%of 210 total for the year
- Median mileage
- 99,750miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the engine of the 2004 Mercury Mountaineer, 4% of the 210 complaints for this model year. Where a mileage was given, the median is 99,750 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.
“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.”
NHTSA complaint #10840317, filed 2016-03, 143,000 miles“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!”
NHTSA complaint #10464762, filed 2012-07, 45,600 miles“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…”
NHTSA complaint #10514957, filed 2013-06, 99,750 miles“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.”
NHTSA complaint #10625842, filed 2014-08, 99,000 miles“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.”
NHTSA complaint #10493478, filed 2013-01, 130,629 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 2004 Mercury Mountaineer
79 complaintsTransmission and drivetrain
64 complaintsVehicle speed control
21 complaintsElectrical system
16 complaintsAir bags
12 complaintsEngine cooling
11 complaintsOther or unknown
9 complaintsVisibility (wipers, defrost, mirrors)
7 complaintsSuspension
6 complaintsBrakes
5 complaintsSteering
5 complaintsLatches, locks and linkages
4 complaints
← All problems reported for the 2004 Mercury Mountaineer
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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