2009 Mercury Mariner Equipment Problems
- Complaints
- 1about this part
- Share
- 0%of 315 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the equipment of the 2009 Mercury Mariner, 0% of the 315 complaints for this model year.
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.
“My car 2009 Mercury Mariner premier, has been slipping (tach goes up but my speed does not) since I bought the car 2-3 years ago. There is now about 56,000 miles on the car. It has been a cold winter, and when I start the car and it is cold, I have been seeing a little pool of oil like substance, and when I back up, there is a line of it. It then seems to stabilize and stop. One day I was using the car cold, and the tack went up, but I couldn't go any faster, or upshift. I took it to the garage, and they said: 6f35 transmission - fluid leak - seal - left side halfshaft. …”
NHTSA complaint #10568028, filed 2014-03Related service bulletins
- 10137113Mar 30, 2018Replacing the original equipment SYNC/Navigation system with either an aftermarket SYNC/Navigation kit or modifying original SYNC/Navigation parts to provide additional features…
- 10140323Jan 10, 2018The Accessory (Wireless) Keyless Entry Keypad can only be used with vehicles that are factory built with Remote Keyless Entry (RKE). The master code for the Accessory (Wireless)…
- 10138524Jan 10, 2018The Accessory (Wireless) Keyless Entry Keypad can only be used with vehicles that are factory built with Remote Keyless Entry (RKE). The master code for the Accessory (Wireless)…
- 10095184Jan 24, 2017Replacing the original equipment sync/navigation system with either an aftermarket sync/navigation kit or modifying original sync/navigation parts to provide additional features…
- 10057860Sep 1, 2014Ford: in valve body, a worn solenoid pressure regulator valve has diagnostic trouble code (dtc) p0735 stored and indication of repair history was the valve body was not replaced…
- 10056710Aug 28, 2014Mercury/ford: in one or more speed settings, electronic manual temperature control (emtc) a/c system is warm and/or lack blower motor operation in settings due to damaged blower…
- 10056183Jun 11, 2014Ford: the throttle body internal motor contacts may be contaminated, resulting in an electrical, intermittent, connectivity, causing malfunction indicator lamp (mil) or wrench…
Equipment: 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 complaintsOther or unknown
15 complaintsBrakes
14 complaintsEngine cooling
7 complaintsWheels
7 complaintsAir bags
4 complaintsElectronic stability control
4 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