2009 Mercury Mariner Hybrid Fuel system Problems
- Complaints
- 3about this part
- Share
- 14%of 21 total for the year
- Median mileage
- 75,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the fuel system of the 2009 Mercury Mariner Hybrid, 14% of the 21 complaints for this model year. Where a mileage was given, the median is 75,000 miles.
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.
“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 milesFuel system: other model years
Other parts of the 2009 Mercury Mariner Hybrid
8 complaintsVehicle speed control
6 complaintsBrakes
4 complaintsEngine
4 complaintsElectrical 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