2011 Mercury Mariner problems & reliability
87 owner complaints filed with NHTSA for the 2011 Mercury Mariner, alongside 2 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
1 complaint report injuries (1 injured).
Federal crash records (FARS 2020–2023): 2011 Mercury Mariner vehicles were involved in 4 fatal crashes with 2 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Power Train | 24 | 28% |
| Fuel/propulsion System | 22 | 25% |
| Steering | 20 | 23% |
| Vehicle Speed Control | 15 | 17% |
| Engine | 11 | 13% |
| Fuel System, Gasoline | 7 | 8% |
| Electrical System | 6 | 7% |
| Engine and Engine Cooling | 3 | 3% |
| Unknown OR Other | 3 | 3% |
| Visibility | 3 | 3% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 53,000 miles (middle 50% between 41,838 and 102,500 miles), based on 67 complaints that included mileage.
Complaints by incident year
What owners report
“The contact owns a 2011 Mercury Mariner. The contact stated that while driving at an undisclosed speed, the power steering became inoperable with no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed that the steering shaft port sensor had failed and needed to be replaced. The…”
Steering · filed May 19, 2026
“My dealer says my subframe needs to be replaced, and controll arm at a cost of 3600 dollars, I don't understand why my subframe needs to be replaced, I've owned cars for as long as 20 yrs and never had that problem. This sounds like a manufacturers problem.”
Suspension · filed Mar 27, 2026
“The contact owns a 2011 Mercury Mariner. The contact stated that while driving at an undisclosed speed, there was a strong fuel odor inside the vehicle. In addition, the contact stated that the fuel odor was noticeable all the way to the rear seat. The vehicle was taken to the dealer; however, the contact was informed…”
Fuel System, Gasoline · filed Feb 11, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Loss of power steering while driving
Defect Petition DP15001 · opened Apr 1, 2015 · closed Jun 14, 2018
- Electronic Throttle Body Malfunction
Preliminary Evaluation PE13003 · opened Feb 21, 2013 · closed Feb 28, 2014
- Rear Liftgate Window Glass Breakage
Preliminary Evaluation PE11016 · opened Apr 27, 2011 · closed Aug 18, 2011
Technical service bulletins
27 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2011 Mercury Mariner. The 10 most recent:
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, 2020
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-M3J3F-07 · Service Bulletin/Repair Instructions · issued Jun 3, 2020
Some 2010-2020 vehicles may exhibit distorted glass with a subtle orange peel pattern or streaking etched into the surface. This is caused by hydrofluoric acid which is used in some car wash solutions as a cleaning…
SSM 48130 · Service Bulletin/Repair Instructions · issued Aug 9, 2019
On vehicles equipped with an automatic transmission it is imperative that the converter pilot hub be greased with Motorcraft Multi-Purpose Grease Spray XL-5-A even if grease was not applied from the factory. Also verify…
SSM 47976 · Service Bulletin/Repair Instructions · issued May 10, 2019
Replacing the original equipment sync/navigation system with either an aftermarket sync/navigation kit or modifying original sync/navigation parts to provide additional features is not recommended nor supported on any…
SSM 46332 · Service Bulletin/Repair Instructions · issued Jan 24, 2017
Some 2008-2017 ford/mercury/lincoln vehicles equipped with sync may generate a vhr that identifies a concern with the brakes and suspension category indicating service is required due to a brake system warning lamp…
SSM 46132 · Service Bulletin/Repair Instructions · issued Oct 17, 2016
Some 2008-2017 ford/mercury/lincoln vehicles equipped with sync may generate a vhr that identifies a concern with the brakes and suspension category indicating service is required due to a brake system warning lamp…
SSM 46132 · Service Bulletin/Repair Instructions · issued Oct 17, 2016
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
6F35 TRANSMISSION - FLUID LEAK AT LEFT SIDE HALFSHAFT SEAL BUILT ON OR BEFORE 10/14/2013 ISSUE Some 2009-2014 Escape, 2009-2011 Mariner, 2010-2014 Fusion, 2010-2011 Milan, 2012-2014 Edge/Explorer, and 2013-2014…
16-0043 · Service Bulletin/Repair Instructions · issued Mar 15, 2016
Ford: no service action is recommended for this condition. Please use at your discretion. Various 2010-2015 vehicles may experience a turbulence noise, similar to an helicopter noise, at highway speeds when the rear…
44863 · Service Bulletin/Repair Instructions · issued Jul 1, 2015
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2011 Mercury Mariner has 2 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2011 Mercury Mariner?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 53,000 miles — budget accordingly if the car is approaching that mileage.