2005 Mercury Montego Vehicle speed control Problems
- Complaints
- 24about this part
- Share
- 18%of 135 total for the year
- Median mileage
- 83,155miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 24 complaints about the vehicle speed control of the 2005 Mercury Montego, 18% of the 135 complaints for this model year. Where a mileage was given, the median is 83,155 miles. 2 of these say a crash was involved, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was in the meddle lane of a four lane highway when I lost all my acceleration. The motor was still running but I could not go anywhere. When I got off the highway I restarted the car but every few miles it would do the same thing. Am told that it is a bad throttle body and ford has known about it for years but is not doing anything about it. It is going to get people killed ! My part cost over 600.00 so it sets in the drive.”
NHTSA complaint #10544569, filed 2013-09, 133,000 miles“My 2005 Mercury Montego (79,000mi.) has unexpectedly lurched on two occasions. The first time I was driving slowly in a parking lot, and the car suddenly accelerated and lunged forward. Braking helped, but the lunging occurred again each time I tried to drive forward. I was able to move into a parking space and turn the car off which stopped the lurching movement. I sat for several minutes, restarted the car and drove away without incident. This didn't happen again for several months until a similar occurrence yesterday. …”
NHTSA complaint #10357637, filed 2010-09, 79,000 miles“As I was going down the highway, the car would suddenly feel as though I had put the gas pedal to the floor. It would suddenly accelerate even though I did not change the pressure on the gas pedal. I took the car to the local dealership and they had an owner notification from ford to clean the throttle body. The work was completed. However, the problem was never fixed. The vehicle would continue to do this on occasion. Now, the vehicle will completely shut off while I am driving down the highway. The fail safe light will come on and I have to coast to the side of the road. …”
NHTSA complaint #10547417, filed 2013-10, 113,486 miles“The car has been lurching forward and decelerating randomly. Keeps going into failsafe engine mode and the wrench light comes on but only for a few moments, then runs normally again after restarting. Haven't been able to have the light on long enough to get diagnostics done. Happens while driving or when starting occasionally.”
NHTSA complaint #11084766, filed 2018-04, 123,000 miles“When accelerating the vehicle would be rough and inconsistent almost lurching forward at times. The vehicle would do this every time it was driven. After having to replace the vehicles battery the vehicle would not accelerate at all. The rpms would not go above 1000. The throttle body was replaced and now the vehicle drives fine. I do still have the old part.”
NHTSA complaint #10420826, filed 2011-08, 73,000 milesVehicle speed control: other model years
Other parts of the 2005 Mercury Montego
49 complaintsElectrical system
27 complaintsBrakes
18 complaintsFuel system
12 complaintsEngine
10 complaintsBody and structure
10 complaintsEngine cooling
7 complaintsOther or unknown
6 complaintsAir bags
5 complaintsExterior lighting
3 complaintsLatches, locks and linkages
3 complaintsSeat belts
2 complaints
← All problems reported for the 2005 Mercury Montego
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