2010 Mercury Mariner engine problems
61 owner complaints filed with NHTSA name the engine on the 2010 Mercury Mariner — 23% of all complaints for this model year.
What owners report
“Me and my wife purchased a vehicle from a private seller to use for personal commute. A month later we started to notice more issue were occurring with the car then stated from the seller. I took it to an auto body shop to get it inspected and possibly serviced and upon that inspection the clerk…”
filed Sep 8, 2025
“When the weather is hot (close to 100 degrees or more) and I am driving with the a/c - my vehicle on 3 occasions will not start after parking the vehicle and trying to restart it. The red padlock sign blinks and it won't start. At first it is trying to turnover but then will continually sound worse…”
filed Jun 5, 2022
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
These SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication requested return of unsold inventory due to a loss of CARB certification. These SKUs can no longer be sold as they do not meet CARB…
DOR-M9J4S-07 · Service Bulletin/Repair Instructions · issued Jun 3, 2020These SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication requested return of unsold inventory due to a loss of CARB certification. These SKUs can no longer be sold as they do not meet CARB…
DOR-M3J3F-07 · Service Bulletin/Repair Instructions · issued Jun 3, 2020
Engine problems in other Mariner years
| Year | Reports | Share |
|---|---|---|
| 2011 Mariner | 11 | 13% |
| 2009 Mariner | 53 | 17% |
| 2008 Mariner | 14 | 3% |
| 2007 Mariner | 7 | 21% |
| 2006 Mariner | 8 | 13% |
| 2005 Mariner | 8 | 12% |
Other reported problem areas on the 2010 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.