2009 Mercury Mariner Hybrid Vehicle speed control Problems
- Complaints
- 6about this part
- Share
- 29%of 21 total for the year
- Median mileage
- 81,590miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the vehicle speed control of the 2009 Mercury Mariner Hybrid, 29% of the 21 complaints for this model year. Where a mileage was given, the median is 81,590 miles. 1 of these say a crash was involved, 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.
“I was approaching a stop sign going about 15 MPH and the applied the brake. Instead of stopping, the car accelerated and I had to steer around a car in the intersection to avoid an accident. I applied the emergency brake and threw the car into park to stop it.”
NHTSA complaint #10820879, filed 2016-01, 88,181 miles“I was on my way to drop my 3 month old off at daycare and then to work. I was driving down the highway going 60 MPH with the cruise control set when I feel the car start to jerk back and forth a little. I look at my gauges all are normal except the RPM gauge is jumping up and down then all of a sudden it is kick out of cruise control, and I lose acceleration and a wrench light came on. I was almost hit by 2 vehicles because of the sudden lose on speed. As I was losing acceleration, I was trying not to brake because I thought it was going to die. …”
NHTSA complaint #11020561, filed 2017-08, 128,000 miles“Throttle body problem. All of a sudden I had no power and barely made it home. I had to be towed to ramey ford in princeton, wv they replaced throttle body but I had to pay $100 deductible. This car was part of a customer service arrangement worked out with NHTSA but the VIN was not included and I was told it was not covered for cost of replacement . This was a very dangerous situation and could have resulted in an accident. I feel the part should have been replaced without any charge since other vehicles in this class had the same problem. …”
NHTSA complaint #10929802, filed 2016-12, 40,000 miles“My car, on 4-5 occasions now, has lost all power while traveling on the freeway at about 80 miles per hour. I called ford because of the electronic throttle body customer satisfaction program and my vehicle does not qualify because of the assembly plant that the car was built at. I can attest that my vehicle is doing the same exact thing that is described in the accounts of the problem with the throttle - without question. I urge you to expand the program that ford is being required to do for this massive (over 1 million vehicle) problem. …”
NHTSA complaint #10641710, filed 2014-10, 148,000 miles“Vehicle loses all ability to control the throttle both while at highway speed and when pulling away from a stop. Wrench fault indicator on the dashboard illuminates. Restarting the vehicle restores normal operating conditions until the issue reappears. There is no fault code on obdii reader after restarting the engine.”
NHTSA complaint #10679147, filed 2015-01, 75,000 milesVehicle speed control: other model years
Other parts of the 2009 Mercury Mariner Hybrid
8 complaintsBrakes
4 complaintsEngine
4 complaintsElectrical system
3 complaintsFuel system
3 complaintsElectronic stability control
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2009 Mercury Mariner Hybrid
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