2009 Mercury Mariner engine problems
Owners reported engine problems in 60 complaints for the 2009 Mercury Mariner, 14% of the complaints on file. It is the 2nd most reported problem area for this model year.
At a glance
- Complaints
- 60 14% of this year's complaints
- Typical mileage
- 69,000 miles 57 complaints with mileage
- Crashes and fires
- 0 and 0
- Injuries and deaths
- 0 and 0
Source: NHTSA owner complaints
When engine problems show up
View the numbers
| Mileage | Complaints |
|---|---|
| 0k to 20k miles | 4 |
| 20k to 40k miles | 9 |
| 40k to 60k miles | 10 |
| 60k to 80k miles | 15 |
| 80k to 100k miles | 11 |
| 100k to 120k miles | 6 |
| 120k to 140k miles | 2 |
| 140k to 160k miles | 0 |
| 160k to 180k miles | 0 |
| 180k to 200k miles | 0 |
| 200k+ miles | 0 |
What the data shows
Of the 57 engine complaints that report mileage, the median is about 69,000 miles, and 40% were reported before 60,000 miles.
None of the engine complaints mention a crash, fire, injury or death.
What owners wrote
The vehicle stalls randomly. I may be driving or idling and the car stalls. It is easily started again by putting the car in neutral and turning the key. I have had ford look at it several times and they first changed the battery and then second changed the gas filter. The problem still exists.
Mercury mariner (2009) v6 4wd. Has stalled twice. 1. While driving at 35 MPH. It stalled and was able to restart once the vehicle stopped on the side of the road. We took it to a ford dealer and the throttle body was replaced. 2. Stalled when slowing to a stop. This was after the throttle body was replaced on 10/13/2017. Only driven about 500 miles. Both times vehicle was going down a country road.
Other problems reported for the 2009 Mercury Mariner
- Steering 167 complaints
- Cruise control 41 complaints
- Drivetrain & axles 41 complaints
- Fuel system 30 complaints
- Electrical system 22 complaints