2009 Mercury Mariner: Recalls, Problems & MPG
Here are the deets on the 2009 Mercury Mariner: 1 recall, 315 owner complaints and up to 23 mpg combined.

Recalls
1 vehicle recall from the manufacturer, plus 1 equipment/tire recall that can apply. Repairs are free. Check your VIN to see if one is still open on your car.
Steering Vehicle recall #14V284000 · 2014 · 740,878 vehicles
What's wrong: The affected vehicles have a steering torque sensor that May not be able to properly detect driver steering input. As a result, the system could remove the electric power steering (eps) assist.
Why it matters: If power steering assist is lost, greater driver effort would be required to steer the vehicle at low speeds, increasing the risk of a crash.
The fix: Ford will notify owners, and dealers will update the software for the power steering control module (pscm) and the instrument cluster module, free of charge. If a vehicle shows a history of a loss of the torque sensor signal or fault codes relating to the pscm when the vehicle is brought in for the…
1 aftermarket equipment / tire recall replacement parts sold to fit this car, not the car itself
Suspension Equipment recall #15E045000 · 2015 · 576 vehicles
What's wrong: The affected wheel bearings have incorrect dimensions of a 42mm bore, 76mm outer dimension, and 39mm width, instead of a 42mm bore, 78mm outer dimension and a 45mm width.
Why it matters: Use of an incorrectly sized wheel bearing can adversely affect the braking and steering of the vehicle, increasing the risk of a crash.
The fix: Timken has begun notifying distributors who will offer purchasers replacement wheel bearings, free of charge. The recall began on May 21, 2015.
Most-reported problems
Owner complaints filed with NHTSA, by component. One complaint can list several components. 0 mention a fire, 3 injuries and 0 deaths were reported.
What owners describe
- Steering (167): the most common themes are steering problems (162), warning light on (34).
- Engine (53): the most common themes are stalls / loses power (28), warning light on (20).
- Transmission & drivetrain (44): the most common themes are warning light on (15), stalls / loses power (14), hard / delayed shifting (12).
- Speed control / throttle (41): the most common themes are stalls / loses power (15), warning light on (9).
The 2009 Mercury Mariner has 315 owner complaints, ranking #2 of 11 Mariner model years for complaints (2.7× the average Mariner year). Complaints peaked in 2013 (64 filed that year). The typical problem showed up when the car was about 7 years old, at a median of 97,000 miles. Neighboring years: 2008 (461 complaints, 3 recalls), 2010 (270 complaints, 2 recalls).
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 2.5 L 4-cyl | Automatic 6-spd | Front-Wheel Drive | 20 | 28 | 23 | Regular |
| 3.0 L 6-cyl | Automatic 6-spd | Front-Wheel Drive | 18 | 26 | 21 | Regular |
| 2.5 L 4-cyl | Automatic 6-spd | 4-Wheel or All-Wheel Drive | 19 | 25 | 21 | Regular |
| 3.0 L 6-cyl | Automatic 6-spd | 4-Wheel or All-Wheel Drive | 17 | 24 | 20 | Regular |
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the 2009 Mercury Mariner.
Closest thing to the factory manual for most years. Pay once, keep it.
Most $25–$78, one-timePro-shop repair procedures, wiring diagrams and TSBs for your exact car.
From $19.99/mo · $39.99/yrOEM procedures, specs and recall/TSB info, the same source many shops use.
From $19.99/mo · $59.99/yrStep-by-step photos written from a real teardown. Great for first-timers.
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FAQ
Does the 2009 Mercury Mariner have any recalls?
Yes. NHTSA lists 1 vehicle recall for the 2009 Mercury Mariner, plus 1 equipment or tire recalls that can apply. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What are the most common 2009 Mercury Mariner problems?
Owners have filed 315 complaints with NHTSA. The most-reported areas are steering (167), engine (53), transmission & drivetrain (44).
What gas mileage does the 2009 Mercury Mariner get?
EPA ratings run up to 23 mpg combined (2.5 L, Automatic 6-spd), across 4 engine and transmission combos.
Where can I get a 2009 Mercury Mariner repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.