AI Damage2009 Mercury Mariner Hybrid: common problems
Owners of the 2009 Mercury Mariner Hybrid filed 21 complaints with NHTSA, most often about steering and vehicle speed control. Details by component below, with sources.
Key figures
- Owner complaints
- 21
- involving a crash
- 2
What fails most often
- 1 Steering 38% of all complaints
- 2 Vehicle speed control 29% of all complaints
- 3 Engine 19% of all complaints
- 4 Service brakes 19% of all complaints
- 5 Electrical system 14% of all complaints
- 6 Fuel/propulsion system 14% of all complaints
- 7 Electronic stability control 5% of all complaints
- 8 Powertrain 5% of all complaints
- Steering: 8 complaints (38% of all), 1 of them with a crash reported by the owner.
- Vehicle speed control: 6 complaints (29% of all), 1 of them with a crash reported by the owner.
- Engine: 4 complaints (19% of all).
- Service brakes: 4 complaints (19% of all).
- Electrical system: 3 complaints (14% of all).
Symptoms owners describe
How many of the 21 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Steering | 8 | 1 | 0 |
| Vehicle speed control | 6 | 1 | 0 |
| Engine | 4 | 0 | 0 |
| Service brakes | 4 | 0 | 0 |
| Electrical system | 3 | 0 | 0 |
| Fuel/propulsion system | 3 | 0 | 0 |
| Electronic stability control | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Power steering went out, couldn't turn vehicle fast enough to avoid crash. Recall 14s05.
Tl contact owns a 2009 mercury mariner hybrid. The contact stated that after applying the brakes in the parking lot the vehicle accelerated. The vehicle did not respond to the brakes and did not stop until the vehicle crashed into a parked vehicle.
While driving approximately 25 mph, the power steering failed without warning and the steering became difficult to turn. The vehicle was not taken to be diagnosed or repaired. The vehicle was not included in nhtsa campaign number: 14v284000 (steering).
I was driving down the highway going 60 mph with the cruise control set when I feel the car start to jerk back and forth a little. I look at my gauges all are normal except the rpm gauge is jumping up and down then all of a sudden it is kick out of cruise control, and I lose acceleration and a wrench light came on.
Steering torque sensor is failing, resulting in loss of steering control. This vehicle was not included in the recall that ford already issued for the problem in 2014 but should be.
Throttle body problem. All of a sudden I had no power and barely made it home. I had to be towed to ramey ford in princeton, wv they replaced throttle body but I had to pay $100 deductible.
Hesitates briefly, then accelerator ceases to function completely. Despite the extremely dangerous situation, we managed to maneuver the car off the road to safety. Warning light (triangle with exclamation point) and warning message "stop safely now". The car computer knows there is a problem, why doesn't ford?
Would see a warning that says 'regen brake failure.' abs just went out one day while coming home from the store, and would reset when the car sat for a while. And syre was not fun to drive, but unless it stayed off there was not much they could do at ford to fine out what was going on.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 8,077 of 36,656 model years in the NHTSA data (top 22% most complained about).
On average one model year of the Mariner Hybrid has 35 complaints (6 years in the data). This year has 21, below average.
What to check before buying
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Other years of this model
Questions and answers
What are the most common problems with the 2009 Mercury Mariner Hybrid?
Owner complaints to NHTSA most often mention: steering, vehicle speed control, engine. Total complaints: 21. The most frequent symptoms in complaint texts: steering or power steering problems (33%), warning lights, check engine (14%), brake failure (10%).
How many service bulletins (TSB) were issued for the 2009 Mercury Mariner Hybrid?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2009 Mercury Mariner Hybrid from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2009 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.