2009 Mercury Mariner Fuel system Problems
- Complaints
- 30about this part
- Share
- 10%of 315 total for the year
- Median mileage
- 73,000miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 30 complaints about the fuel system of the 2009 Mercury Mariner, 10% of the 315 complaints for this model year. Where a mileage was given, the median is 73,000 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“While unit is running on road engine still running car stop for absent of power but engine keep running, pressing gas pedal will do anything , you have to turn engine off wait and turn engine on back in order to kept driving , this very dangerous because this happens in the middle of the hay way at any speed , please consider a recall we almost get kill by a rear impact if we did react fast . Update does not fix situation, this a troubleshooting from factory and they now this very clear. …”
NHTSA complaint #11101842, filed 2018-06, 10 miles“On 1/1/2016 I was driving on 495 w in queens, ny heading back to manhattan where I live. Out of nowhere the car began jerking, a wrench light on the dash panel came on (which I never saw before) and I could tell the car was decelerating. I tried hitting the accelerator again, the car would jerk, the engine was revving but was barely moving. I knew I had to pull over and luckily I was able to navigate to the shoulder of the road. This was an extremely dangerous situation. …”
NHTSA complaint #10818297, filed 2016-01, 73,000 miles“As my daughter was driving on the freeway, the engine suddenly lost power and she had to work her way to the side across 3 lanes of heavy traffic with no power. Our mechanic replaced the throttle body at our expense. The news today indicated that you were investigating the circuit board which controls the throttle and we wanted you to know that this problem was a threat to her safety and appears to be occurring to many people. This was the fourth time the vehicle has stopped while driving.”
NHTSA complaint #10500179, filed 2013-02, 99,000 miles“On october 18, 2018 I received the power steering assist failure error on my instrument panel when turning on my vehicle. I had driven it earlier in the day without issue. Previously I had the occasional warning noise and quick flash of an error (too quick for me to read all the way) and would have momentary difficulty turning. This issue makes it almost impossible to steer the vehicle. Research indicates that it is most likely a malfunctioning torque sensor. I reached out to ford after learning of recalls for the 2009 model year. I was informed that my VIN was not included in the recall. …”
NHTSA complaint #11165415, filed 2019-01, 105,000 miles“I was leaving work and driving down a road at about 50mph when all of a sudden my car jumped and I then was coming up to a red light so I was braking and behind a car. At the red light I was a few inches from hitting the car because my car kept jumping forward. I then got scared and turned my car off and back on and it was driving fine. Then all of a sudden it did the same thing and I couldn't accelerate I would press on the gas and my car was just shaking and losing speed and wouldn't move. Thankfully I didn't drive the highway home that day.”
NHTSA complaint #10515102, filed 2013-06, 29,000 milesFuel system: other model years
Other parts of the 2009 Mercury Mariner
167 complaintsEngine
53 complaintsTransmission and drivetrain
44 complaintsVehicle speed control
41 complaintsElectrical system
22 complaintsOther or unknown
15 complaintsBrakes
14 complaintsEngine cooling
7 complaintsWheels
7 complaintsAir bags
4 complaintsElectronic stability control
4 complaintsBody and structure
3 complaints
← All problems reported for the 2009 Mercury Mariner
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