2009 Mercury Mariner Engine Problems
Owners have filed 53 complaints with NHTSA about engine problems on the 2009 Mercury Mariner, 17% of all complaints for this model year. Half of the reports with a mileage happened before 73,000 miles. The words owners use most often: “throttle body” (30% of reports).
- 53engine complaints
- 73,000median miles at failure
- 0mention a crash
- 0mention an injury
- 0related recalls
- 39%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Throttle body: mentioned in 16 of 53 complaints (30%)
- Side road: mentioned in 7 of 53 complaints (13%)
- Off restarted: mentioned in 6 of 53 complaints (11%)
At what mileage do engine problems happen?
Based on 50 complaints that reported the odometer reading.
How serious are the reports?
None of the 53 complaints report a crash, fire or injury.
Mercury Mariner engine complaints by model year
| Model year | Engine complaints | Share of that year | Median miles |
|---|---|---|---|
| 2011 Mariner | 11 | 13% | 49,000 |
| 2010 Mariner | 61 | 23% | 52,000 |
| 2009 Mariner | 53 | 17% | 73,000 |
| 2008 Mariner | 14 | 3% | 113,500 |
| 2007 Mariner | 7 | 21% | 65,000 |
| 2006 Mariner | 8 | 13% | 75,771 |
| 2005 Mariner | 8 | 12% | 129,000 |
When owners reported it
Related recalls (0)
No safety recall lists engine for the 2009 Mercury Mariner. A pattern of complaints does not always lead to a recall.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
My 2009 mercury mariner (has 56,000 miles), without any warning, it just shut off while i was driving it. Has happened twice. Was able to get the side of the road and was able to restart it. No warning lights came on at all. Car is at dealership now to have it checked out.
Vehicle randomly and suddenly loses power on highway. Dashboard lights up, have to pull off road turn off and wait a short time then resumes normally. Possibly throttle body problem.
While traveling approximately 35 mph, driving in a straight line on a city street in traffic, the abs abruptly applied the brakes - hard! The abs light came on and a "check brake system" warning message was displayed. Also, the electrical system shut down and the engine lost power. After about 5…
Frequently asked questions
Do all 2009 Mercury Mariners have engine problems?
No. NHTSA has 53 owner complaints about engine for the 2009 Mercury Mariner (17% of the 315 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2009 Mercury Mariner engine?
No recall currently lists engine for this vehicle.
At what mileage do engine problems start?
The median reported mileage is 73,000 miles: half of the reports with a mileage came before that.
What do owners say about engine problems on the 2009 Mercury Mariner?
The most frequent phrase is “throttle body”, in 16 of 53 complaints, followed by “side road” (7).
Other 2009 Mercury Mariner problems
- Steering problems (167)
See all 2009 Mercury Mariner problems or engine problems across all Mariner years.