EnginePart report

2011 Mercury Mariner Engine Problems

Complaints: 11about this part
Share: 13%of 87 total for the year
Median mileage: 49,000miles
Trend: Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 11 complaints about the engine of the 2011 Mercury Mariner, 13% of the 87 complaints for this model year. Where a mileage was given, the median is 49,000 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“The vehicle lost all power from the motor and I had to cross lanes to get to the shoulder while free wheeling. This has now happened on 3 occasions. The motor was still running but with no pulling power. Once I had switched the motor off and waited a few moments I was able to restart and the vehicle operated perfectly.”

NHTSA complaint #10559592, filed 2014-01, 38,000 miles

“My son and I were on the way home from football practice around 8:30pm and as I was turning right from a stop light the vehicle started slowing down and shaking. I pulled right over turned the car off and on. Once I got back on the road it did it a second time and so I proceeded to pull over and turn car off and on again. I was close to home and finally made it home.”

NHTSA complaint #10543034, filed 2013-09, 49,000 miles

“On the morning of september 10, 2013, after about a 30 minute commute to my place of work, I pulled into my work driveway, and my 2011 Mercury Mariner stalled. The engine seemed to cut off, the wrench light came on, and my vehicle rolled into the parking spot. Unsure of what had happened with my vehicle (as it had never happened before), I immediately called my local ford dealership service department. …”

NHTSA complaint #10546331, filed 2013-09, 60,884 miles

“Started vehicle in the morning for work & yellow wrench light came on, combined with limp mode symptoms of no throttle response. Googled & found multiple complaints for similar issues with this motor. Called local ford dealer who said the throttle body has had 3 different part numbers which leads me to believe that this has been a know issue for a while now. Ordered the latest version of the throttle body & will have it replaced by my mechanic who said its a 1/2 hr install. …”

NHTSA complaint #10521672, filed 2013-06, 27,000 miles

“Car seems to stall all power stays on but the car shakes and then stalls and the wrench light comes on which is a powertrain light. Took car to dealer they say there is nothing wrong with it. They reset the light. One week after bring the car to the dealer the wrench light comes back on and the car stalls this time I was going 55 miles an hour on a parkway thankfully I was able to pull over before the car stopped. Brought to dealer, nothing is wrong with the car they recommended me to leave the heat off because there could be a problem with the heat. …”

NHTSA complaint #10500190, filed 2013-02, 24,000 miles

Related service bulletins

10109070Sep 21, 2016The 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…
10053656Nov 13, 2013Ford: due to an intermittent loss of rpm or lack of acceleration, in some vehicles, with illuminated wrench light, diagnostic trouble codes (dtcs) p2111, p2112 may or may not be…
10052191Apr 1, 2013Ford/lincoln/mercury: some vehicles may experience an illuminated mil or safety stop now message, or a no start condition or possible misfire or roughness at idling through…
10044230Mar 1, 2012Ford/mercury/lincoln: some vehicles exhibit a cold weather phenomenon where fluid has expelled out of vent on rear drive units (rdu) and fluid, on occasion, would burp out.

Engine: other model years

Year	Complaints	Share of year
2011	11	13%
2010	61	23%
2009	53	17%
2008	14	3%
2007	7	21%
2006	8	13%
2005	8	12%

Other parts of the 2011 Mercury Mariner

Fuel system
28 complaints Transmission and drivetrain
24 complaints Steering
20 complaints Vehicle speed control
15 complaints Electrical system
6 complaints Visibility (wipers, defrost, mirrors)
6 complaints Engine cooling
3 complaints Other or unknown
3 complaints Air bags
2 complaints Equipment
1 complaints Suspension
1 complaints

← All problems reported for the 2011 Mercury Mariner

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology