2009 Mercury Mariner problems and complaints
Owners have filed 315 complaints with NHTSA about the 2009 Mercury Mariner. The most-reported areas: Steering (167), Engine (53), Power Train (44).
Key takeaways
- 315 owner complaints on file with NHTSA.
- 9 involve a crash, 0 a fire, 3 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Steering | 167 | 53% |
| Engine | 53 | 17% |
| Power Train | 44 | 14% |
| Vehicle Speed Control | 41 | 13% |
| Electrical System | 22 | 7% |
| Unknown Or Other | 15 | 5% |
| Fuel/Propulsion System | 15 | 5% |
| Fuel System | 15 | 5% |
| Gasoline | 15 | 5% |
| Service Brakes | 14 | 4% |
| Wheels | 7 | 2% |
| Engine And Engine Cooling | 7 | 2% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2009 Mercury Mariner 4-DR. w/SAB | Not rated | Not rated | Not rated | 3/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Steering,wheels - filed 2026-04-11
My vehicle was returned to me following a torque sensor replacement on 4/9/2026 in poor condition (locked steering and a catastrophic gash in the driver-side tire) rendering it undrivable and unsafe. Crossroads Ford of Prince George shop's inspection report claims the tire damage was pre-existing, I have conclusive evi...
Steering - filed 2026-03-02
The contact owns a 2009 Mercury Mariner. The contact stated that while driving at undisclosed speeds on several occasions, the steering wheel started shaking abnormally. The contact added that on several occasions while driving at undisclosed speeds, the vehicle lost power steering functionality, but the vehicle regain...
Steering - filed 2026-02-21
My steering has been locking while I am driving and causing loss of steering and control of car. I have contacted crossroads dealer and I have not gotten a response as I am now aware there has been a safety recall on this vehicle.
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More for the 2009 Mercury Mariner
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.