Worst 2009 Mercury Mariner Problems
Top 3 most-reported issues with average mileage at failure.
Steering Defects
Engine Problems
Transmission / Drivetrain
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All Problems by Category
Every NHTSA complaint category for the 2009 Mercury Mariner.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Steering Defects | 166 | 3 | — | 118,821 mi | |
| Engine Problems | 53 | — | — | 73,059 mi | |
| Transmission / Drivetrain | 41 | — | — | 73,162 mi | |
| Unintended Acceleration | 41 | 1 | — | 73,266 mi | |
| Electrical Faults | 21 | — | — | 88,466 mi | |
| Fuel System | 15 | — | — | 80,731 mi | |
| Gasoline Fuel System | 14 | — | — | 68,079 mi | |
| Brakes | 11 | 2 | — | 92,416 mi | |
| Engine & Cooling | 7 | — | — | 27,667 mi | |
| Wheel Issues | 7 | 1 | — | 53,410 mi | |
| Electronic Stability Control | 4 | — | — | — | |
| Automatic Transmission | 3 | — | — | — | |
| Hydraulic Brakes | 3 | — | — | — | |
| Suspension Failures | 3 | 1 | — | — | |
| Airbags | 2 | 1 | — | — | |
| Air Bags:Frontal | 2 | — | — | — | |
| Headlight/Taillight Failures | 2 | — | — | — | |
| Electrical System:Ignition | 1 | — | — | — | |
| Other Equipment | 1 | — | — | — | |
| Fuel System, Gasoline:Storage:Tank Assembly | 1 | — | — | — | |
| Lane Departure: Assist | 1 | — | — | — | |
| Lane Departure: Blind Spot Detection | 1 | — | — | — | |
| Latches/Locks/Linkages:Hatchback/Liftgate:Lock | 1 | — | — | — | |
| Seat Belt Issues | 1 | — | — | — | |
| Steering:Electric Power Assist System | 1 | — | — | — | |
| Structural Problems | 1 | — | — | — | |
| Body Structure | 1 | 1 | — | — | |
| Structure:Frame And Members:Underbody Shields | 1 | — | — | — | |
| Visibility:Windshield | 1 | — | — | — |
Search Owner Complaints
Read what owners actually reported to NHTSA for the 2009 Mercury Mariner. Type a keyword (e.g. “transmission”, “stalling”, “brakes”) to filter.
Recalls for 2009 Mercury Mariner
1 NHTSA recall campaign affecting ~740,878 vehicles.
Ford Motor Company (Ford) is recalling certain model year 2008-2011 Ford Escape and Mercury Mariner vehicles manufactured August 18, 2006, through September 11, 2010. 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.
Other Mercury Mariner Years
2009 Mercury Mariner — FAQ
Answers based on real NHTSA complaint and recall data for this specific model year.
Is the 2009 Mercury Mariner reliable?
What are common problems with the 2009 Mercury Mariner?
At what mileage do problems start on the 2009 Mercury Mariner?
How safe is the 2009 Mercury Mariner?
Does the 2009 Mercury Mariner have any recalls?
Should I buy a 2009 Mercury Mariner?
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinItel.
Wider context: See the full Mercury Mariner reliability report with year-by-year comparison and generation analysis.
Check Your Specific 2009 Mercury Mariner
Real owner complaints tell you about the model. The VIN tells you about your specific car — accidents, title issues, odometer fraud.
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