2009 Mercury Mariner Other or unknown Problems
- Complaints
- 15about this part
- Share
- 5%of 315 total for the year
- Median mileage
- 96,160miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 15 complaints about the other or unknown of the 2009 Mercury Mariner, 5% of the 315 complaints for this model year. Where a mileage was given, the median is 96,160 miles. 1 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.
“Was using cruise control down the road doing 45 miles per hours. While on a straight stretch and going up slight hill car was fine. When I started to go down the slight hill car seemed to sound like it was in neural gear and my rmps jumped to between 3 and 4. I looked to see if some how the car got accidently shifted into neutral and it wasn't it was still in drive. So I turned the cruise control off and everything went back to driving and sounding normal. This is now the third time this has happened. …”
NHTSA complaint #10735051, filed 2015-07, 67,000 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“While driving the car will it suddenly stop receiving any fuel, car does not necessarily stall, it is very dangerous, because I will have to pull over shut the car off and it will restart, the wrench icon will come on, sometimes the engine icon, this at first was random, no pattern, once on the tobin bridge in boston, with very heavy traffic, thankfully was able to pull over out of the way, it would happen randomly for a few months and now it happens so often I am afraid to drive it, I have no money to bring this to a garage as I fear it will cost me way too much to fix, very disappointed…”
NHTSA complaint #10537791, filed 2013-08, 65,000 miles“The vehicle AC unit water drains directly over the front sub-frame and rusts through the frame, at which point the front driver side suspension will collapse and loss of steering results. This problem was acknowledged for some escape vehicles, but not its Mercury Mariner equivalent, even though it shares same part/problem. Dealer refuses to cover repair and cust sevice suggested I contact NHTSA.”
NHTSA complaint #11349924, filed 2020-08, 150,000 miles“I was making a turn and the vehicle seemed as if the steering locked up. It randomly does this and is starting to be more and more often. It has already made me run off of the road and hit a culvert causing even further damage.”
NHTSA complaint #11450026, filed 2022-02Related service bulletins
- 10030846Dec 9, 2009Ford/mercury: traction control light with dtc c1440. Some vehicles built may exhibit the traction control light on with dtc code c1440. If the vehicle is operated for an extended…
Other or unknown: other model years
Other parts of the 2009 Mercury Mariner
167 complaintsEngine
53 complaintsTransmission and drivetrain
44 complaintsVehicle speed control
41 complaintsFuel system
30 complaintsElectrical system
22 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