Is the 2004 Mercury Mountaineer a bad year?
210 owner complaints to NHTSA. Transmission complaints: 64, 4.3× a quiet Mountaineer year.
Keep it, but watch the transmission
Half of the transmission complaints for this year were filed at 41k–85k miles, where you are now.
The verdict moves with mileage: the same car reads differently at 30,000 and at 150,000 miles.
What 2004 Mountaineer owners report, by mileage
Each system owners named in five or more complaints, with the mileage range where the middle half of those complaints were filed. Read at 67,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| Body structureSTANDS OUT | 79 (38%) | 47k–91k miles · around this mileage | — |
| Transmission and drivetrainSTANDS OUT | 64 (30%) | 41k–85k miles · around this mileage | CV axle / CV joint replacement (one side) $300–$1,500 · Automatic transmission replacement $2,500–$7,000 |
| Speed control | 21 (10%) | 37k–98k miles · around this mileage | — |
| Engine | 19 (9%) | 35k–126k miles · around this mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| Electrical system | 16 (8%) | 62k–118k miles · around this mileage | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| Air bags | 12 (6%) | too few with a mileage | — |
| Visibility and wipers | 7 (3%) | too few with a mileage | — |
| Suspension | 6 (3%) | too few with a mileage | — |
| Brakes | 5 (2%) | too few with a mileage | — |
| Equipment | 5 (2%) | too few with a mileage | — |
| Steering | 5 (2%) | too few with a mileage | — |
Bills are typical US ranges from the sources named in the tool (J.D. Power, Kelley Blue Book, CarParts.com and others), printed only for systems that stand out or sit at or ahead of 67,000 miles. Not a quote.
What owners reported alongside their complaints
Of 210 complaints: 11 mention a crash · 2 mention a fire · 15 report an injury · 1 says the car was towed.
No complaints in the last 12 months; the newest was filed in Jun 2021.
Counts of what owners wrote in their complaints, not verified by anyone.
In owners' own words
Have a little over 67,000 miles on vehicle. Driving at highway speed transmission indicator came on, o/d indicator flashes and service engine indicator came on.
Transmission is slipping. I noticed when putting vehicle in reverse it jerks real hard into gear. Also coming to a stop and when taking off from a stop the truck will jerk.
When backing up will hesitate and then fly backwards. Feel of delay in transmission when have come to a stop and going from one gear to next.
Unedited excerpts from complaints filed with NHTSA, chosen by mileage (nearest 67,000 miles), not by content. Unverified.
Recalls for the 2004 Mercury Mountaineer: 1
Certain curved tempered replacement glass manufactured by hangzhou safety glass ltd and supplied to safelite by auto temp inc., identified as DOT-430, and sold for use on certain domestic and foreign vehicles may not break into small pieces as expected of tempered glass and fails to conform to federal motor vehicle… In the event of a vehicle crash, the occupant(S) may be seriously injured by shattered glass.
A recall may cover only some cars of a model year; the campaign size counts every model and year it lists. Enter your VIN at nhtsa.gov/recalls: dealers fix open recalls free.
Service bulletins from Mercury: 3
Repair instructions Mercury sent its dealers for symptoms seen in the shop on the 2004 Mercury Mountaineer. Ask a dealer or mechanic for a bulletin by its number.
Ford/lincoln/mercury: if battery was disconnected or dead, vehicles/trucks may experience hard starts and engine idle RPM fluctuation and exhibit diagnostic…
NHTSA defect investigations: 3
Vehicle Rollaway Allegations
Rear liftgate glass hatch failure
Spark plug ejection from cylinder head
Neighbouring years
2003 Mountaineer: 152 complaints, keep it, but watch the transmission · 2005 Mountaineer: 82 complaints, keep it.
Every Mercury Mountaineer year
2000 · 2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · 2010 · All Mountaineer years side by side
Other Mercury models: Mercury Cougar · Mercury Grand Marquis · Mercury Mariner · Mercury Mariner Hybrid · Mercury Milan · Mercury Montego · Mercury Monterey · Mercury Sable. All makes and models.
Questions
Is the 2004 Mercury Mountaineer a bad year?
210 owner complaints to NHTSA. Transmission complaints: 64, 4.3× a quiet Mountaineer year. At 67,000 miles the tool says: Keep it, but watch the transmission. Half of the transmission complaints for this year were filed at 41k–85k miles, where you are now.
What are the most common problems with the 2004 Mercury Mountaineer?
By owner complaints to NHTSA: body structure (79), transmission and drivetrain (64), speed control (21), engine (19), electrical system (16). Half of the transmission complaints were filed between 41k–85k miles.
How many recalls does the 2004 Mercury Mountaineer have?
1 recall campaign list this model year: Visibility and wipers (NHTSA 07E104000). A recall may cover only some cars; check by VIN at nhtsa.gov/recalls.
Method: counts of unverified owner complaints filed with NHTSA, compared only with other years of the same model (sales volumes are unknown, so no failure rate is computed). A system stands out at 40+ complaints and at least twice the model's quiet (lower-quartile) year, or twice the share across every vehicle of that model year. The mileage range is the 25th to 75th percentile of the mileages owners reported. Data received by NHTSA through November 5, 2026. Repair prices are typical US ranges from named sources, not quotes. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Check this car at your own mileage.