2009 Mercury Mariner engine problems
53 owner complaints filed with NHTSA name the engine on the 2009 Mercury Mariner — 17% of all complaints for this model year.
What owners report
“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.”
filed Jul 1, 2019
“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.”
filed Nov 30, 2018
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing electronic throttle bodies (ETBs). The ETC_ACT and ETC_DSD PIDs should not used to diagnose possible ETB concerns. The IDS has a…
SSM 46085 · Service Bulletin/Repair Instructions · issued Sep 21, 2016
Engine problems in other Mariner years
| Year | Reports | Share |
|---|---|---|
| 2011 Mariner | 11 | 13% |
| 2010 Mariner | 61 | 23% |
| 2008 Mariner | 14 | 3% |
| 2007 Mariner | 7 | 21% |
| 2006 Mariner | 8 | 13% |
| 2005 Mariner | 8 | 12% |
Other reported problem areas on the 2009 Mercury Mariner
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.