1999 Mercury Mountaineer Vehicle speed control Problems
- Complaints
- 11about this part
- Share
- 7%of 151 total for the year
- Median mileage
- 79,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 11 complaints about the vehicle speed control of the 1999 Mercury Mountaineer, 7% of the 151 complaints for this model year. Where a mileage was given, the median is 79,000 miles. 3 of these say a crash was involved, according to the filers. 3 recall campaigns on record are filed under a similar system.
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.
“Curse control occasionally makes engine accelerate while and after brake applied while moving under 5 MPH and even while stopped with brake still applied. More than once a pedestrian was at risk in a crosswalk while vehicle stopped with brake still applied, then engine suddenly became near full throttle, requiring even stronger pressing of brake peddle. We took the car to dealer (henry day ford) who updated engine control rom; but same problem continued to exist. The dealer offered no warranty of repair or even acknowledgement of problem. We now drive with the cruse control and horn and ??? …”
NHTSA complaint #11098222, filed 2018-05, 130,000 miles“Accelerated 1999 Mercury Mountaineer v8 from stop light. Throttle got stuck in accelerate position. Tried to free throttle by repeated pulsing with foot but acccelerator stuck in full throttle position and could not stop car! Had to turn off ignition resulting in no power steering or braking. Was able to free throttle by removcing throttle cover (on engine) and manually moving throttle by hand. Would have hit car in front of me if there was traffic! Throttle plate assembly replaced by authorized ford dealer at my cost.”
NHTSA complaint #10102429, filed 2004-12, 79,000 miles“Tried to set cruise control and it would not hold speed set after 2 attempts, then it just took off . Gas petal was all the way to the floor and I could not get it up. Could not shut off cruise control by braking or hitting off button. Was on expressway and going over 90. Had to fight gas petal all the way to the floor by braking. Fortunately I was on straight section of road and there was no ice and little traffic. I had to wait in car in 6 degree temp. For hr. And a half for aaa to load vehicle on flatbed to take to ford dealership. …”
NHTSA complaint #10054587, filed 2004-01, 61,500 miles“While stopped at a red light with my foot on the brake pedal, the engine bucked and misfired as though it was going to die. Suddenly, the engine revved to the point that with both of my feet on the brake pedal, the car crept ahead and tapped the car ahead of me. Just as quickly as the engine surged, it dropped back in revs to normal idle. On my way home from the scene, it occured again, except this time I had my hand on the auto gear change, moved it qiuckly to neutral, and turned off the ignition. …”
NHTSA complaint #746151, filed 2001-05“While driving there was unattended acceleration. Consumer's foot actually was on the brake and at the accelerator pedal at the same time. The pedals were very close together. Accident occurred. Vehicle was totaled. Upon impact, the air bags did not deploy. .....once off the exit ram slid through grass an dinto pine tree.”
NHTSA complaint #10101124, filed 2004-11Related recalls
- 07V336000Aug 3, 2007On certain pickup trucks, passenger vehicles, sport utility vehicles, and motor homes chassis, the speed control deactivation switch may, under certain…Covers: Mercury Mountaineer 1999–2001, Ford E-150 1992–1993, 1997–2003, E-350 1992–1993, 1997–2003 +18 more
- 03V280000Aug 5, 2003On certain sport utility vehicles equipped with speed control and 4.0l sohc engines, if the strand cover on the speed control cable becomes flared at the end…Covers: Mercury Mountaineer 1999–2001, Ford Explorer 1999–2001, Explorer Sport 2001 +1 more
- 99V062001Mar 30, 1999Vehicle description: certain 1997-1999 rhd explorer equipped with 4.0l ohv/sohc engines and cruise control built from may 29, 1996 through march 4, 1999…Covers: Mercury Mountaineer 1998–1999, Ford Explorer 1997–1999, Ranger 1998–1999 +6 more
Vehicle speed control: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 4 | 31% |
| 2009 | 1 | 17% |
| 2008 | 2 | 2% |
| 2007 | 7 | 9% |
| 2006 | 3 | 3% |
| 2005 | 13 | 16% |
| 2004 | 21 | 10% |
| 2003 | 9 | 6% |
| 2002 | 18 | 5% |
| 2001 | 2 | 9% |
| 2000 | 28 | 23% |
| 1999 | 11 | 7% |
| 1998 | 36 | 15% |
| 1997 | 59 | 18% |
Other parts of the 1999 Mercury Mountaineer
51 complaintsVisibility (wipers, defrost, mirrors)
22 complaintsAir bags
14 complaintsEngine cooling
12 complaintsElectrical system
10 complaintsBrakes
9 complaintsTransmission and drivetrain
8 complaintsEquipment
6 complaintsSeats
4 complaintsSteering
4 complaintsBody and structure
4 complaintsSuspension
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