1999 Mercury Mountaineer Fuel system Problems
- Complaints
- 2about this part
- Share
- 1%of 151 total for the year
- Median mileage
- 88,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the fuel system of the 1999 Mercury Mountaineer, 1% of the 151 complaints for this model year. Where a mileage was given, the median is 88,000 miles. 1 a fire, according to the filers.
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.
“Check engine light was on. Ran diagnostics to determine the fuel tank was not pulling a vacuum. Determined the fuel filler neck pipe was cracked at the top of the line near the tank cap. Went to replace the fuel filler neck pipe and found out where the pipe meets the tank, more than 1/2 of the diameter of the connection was missing (rusted thru) and broke off while trying to remove the hose (the metal attachment from the tank is stuck in the filler neck hose). The outside of the tank was wet with fuel. The rest of the tank is solid with no thin walls. Replaced tank and filler pipe with new.”
NHTSA complaint #10439981, filed 2011-12, 130,000 milesFuel system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 2 | 15% |
| 2008 | 3 | 3% |
| 2007 | 1 | 1% |
| 2006 | 5 | 4% |
| 2005 | 3 | 4% |
| 2004 | 2 | 1% |
| 2003 | 7 | 5% |
| 2002 | 8 | 2% |
| 2000 | 3 | 2% |
| 1999 | 2 | 1% |
| 1998 | 5 | 2% |
| 1997 | 6 | 2% |
Other parts of the 1999 Mercury Mountaineer
51 complaintsVisibility (wipers, defrost, mirrors)
22 complaintsAir bags
14 complaintsEngine cooling
12 complaintsVehicle speed control
11 complaintsElectrical system
10 complaintsBrakes
9 complaintsTransmission and drivetrain
8 complaintsEquipment
6 complaintsSeats
4 complaintsSteering
4 complaintsBody and structure
4 complaints
← All problems reported for the 1999 Mercury Mountaineer
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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