2004 Mercury Mountaineer Power Train Problems
Owners have filed 64 complaints with NHTSA about power train problems on the 2004 Mercury Mountaineer, 30% of all complaints for this model year. Half of the reports with a mileage happened before 66,924 miles. The words owners use most often: “transfer case” (13% of reports).
- 64power train complaints
- 66,924median miles at failure
- 4mention a crash
- 3mention an injury
- 0related recalls
- $3,750typical repair cost reported by owners
- 30%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Transfer case: mentioned in 8 of 64 complaints (13%)
- Transmission fluid: mentioned in 6 of 64 complaints (9%)
How much does it cost to fix?
Owners who wrote down what they paid or were quoted put the typical power train repair on the 2004 Mercury Mountaineer at $3,750, and half of them between $2,350 and $5,200.
Based on 6 NHTSA complaints about this problem alone that state a repair bill or quote (2006–2021), converted to 2026 dollars with the U.S. consumer price index. These are owners' own figures, not a quote: they include dealer quotes, and owners who file complaints often faced larger repairs, so they can run higher than typical shop prices. Prices vary by shop, region and warranty coverage. How we calculate this.
At what mileage do power train problems happen?
Based on 54 complaints that reported the odometer reading.
How serious are the reports?
Of 64 complaints, 4 mention a crash, 1 a fire, 3 an injury.
Mercury Mountaineer power train complaints by model year
| Model year | Power Train complaints | Share of that year | Median miles |
|---|---|---|---|
| 2010 Mountaineer | 2 | 15% | 6,125 |
| 2008 Mountaineer | 9 | 9% | 54,410 |
| 2007 Mountaineer | 25 | 31% | 74,000 |
| 2006 Mountaineer | 39 | 33% | 53,000 |
| 2005 Mountaineer | 19 | 23% | 48,151 |
| 2004 Mountaineer | 64 | 30% | 66,924 |
| 2003 Mountaineer | 42 | 28% | 73,975 |
| 2002 Mountaineer | 144 | 39% | 77,592 |
| 2001 Mountaineer | 1 | 5% | 500 |
| 2000 Mountaineer | 15 | 12% | 59,976 |
| 1999 Mountaineer | 8 | 5% | 68,500 |
| 1998 Mountaineer | 9 | 4% | 33,568 |
| 1997 Mountaineer | 8 | 2% | 100,000 |
When owners reported it
Related recalls (0)
No safety recall lists power train for the 2004 Mercury Mountaineer. A pattern of complaints does not always lead to a recall.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
This vehicle is has a power train problem from day one with the 5R55S/W transmission and AWD transfer case. I purchased this vehicle where it stranded my family over 200 miles from home and it's a non running car. This vehicle should have been removed from being sold with this defect and crushed! I…
Failure of front differential mount carrier bushings failure leading to two transmission rebuilts,transfer case rebuild, and over $5000.00 in repairs. Failure of carrier bushings would lead to front end locking up. Causing a jackhammer affect on the drivetrain of the vehicle. To close calls due to…
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…
Frequently asked questions
Do all 2004 Mercury Mountaineers have power train problems?
No. NHTSA has 64 owner complaints about power train for the 2004 Mercury Mountaineer (30% of the 210 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2004 Mercury Mountaineer power train?
No recall currently lists power train for this vehicle.
At what mileage do power train problems start?
The median reported mileage is 66,924 miles: half of the reports with a mileage came before that.
How much does it cost to fix power train problems on the 2004 Mercury Mountaineer?
Owners report a typical cost of $3,750 (half paid between $2,350 and $5,200), from 6 complaints that state a repair bill or quote, in 2026 dollars.
What do owners say about power train problems on the 2004 Mercury Mountaineer?
The most frequent phrase is “transfer case”, in 8 of 64 complaints, followed by “transmission fluid” (6).
Other 2004 Mercury Mountaineer problems
- Structure problems (79)
See all 2004 Mercury Mountaineer problems or power train problems across all Mountaineer years.