Engine Loses Power


really awful
Typical Repair Cost:
Average Mileage:
62,750 miles
Total Complaints:
5 complaints

Most Common Solutions:

  1. not sure (3 reports)
  2. replaced throttle body (2 reports)
2010 Mercury Mariner engine problems

engine problem

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2010 Mercury Mariner Owner Comments

problem #5

May 192016

Mariner 3.0L 4cl

  • Automatic transmission
  • 64,000 miles


When reached 75 mph car suddenly stalled causing car to slow down, engine to sputter, car was able to coast off to the side of highway. When stop engine stuttered and would have to shut vehicle off and the start again to get the engine to run normally.

- Krystin O., Battlefield, MO, US

problem #4

Mar 202015

Mariner V6

  • Automatic transmission
  • 97,523 miles

From reading reports, this problem points to a throttle body replacement. Many wish to have a recall as it is dangerous to lose power on a major hwy.

- Roger D., San Antonio, TX, US

problem #3

Aug 252013

Mariner 3.2L

  • Automatic transmission
  • 63,600 miles

I purchased this car in August of 2013, and had problems with the car becoming unresponsive while the engine was still running the day after I purchased from a dealership in Santa Maria. If I was in cruise control, it would pop out of cruise control and the accelerator pedal wouldn't work, driving at different speeds the accelerator pedal quit working. I returned the vehicle, and after becoming hysterical right after hearing estimated repair costs of the needed throttle body. So, the dealership offered to fix for me. Since I had only had possession of the car a very brief time. It still occurs occasionally, but nothing near the multiple times a day like before. I am really angry that the warranty I purchased did not cover the part or repairs...can't drive the vehicle without this part!!!

- vjw, Lompoc, CA, US

problem #2

Sep 022013


  • Automatic transmission
  • 50,000 miles

I am a travel nurse. I have owned this vehicle for 2 months and it has now started stalling. It acts like it is not getting gas. Vehicle is still "running" but will not go anywhere. I can pump the gas pedal as much as I want but it will not move. "Wrench" light comes on. I turn on the flashers and hope I can get to a curb/medium as soon as possible to avoid being smashed in the back. I turn off the ignition and when I restart it sputters but will eventually take off and go. This has happened to me now 4 times, this evening being the worse and now the "Wrench" light is accompanied by the "Engine". I will take it to the dealership tomorrow in the morning but this major inconvenience is not just to me but to my patients I may not get to tomorrow. I just got rid of a 1997 Jeep Grand Cherokee for the same thing!

Update from Sep 19, 2013: Took the 2010 Mariner to the Ford, Lincoln, Mercury dealership bright and early. I called them about 4pm and was told that they believe the throttle body needs to be replaced and it is a common problem so they have the part they need in stock. They say this will fix the problem but I have read other complaints that after fixing the throttle body the stalling issue began again in a short period of time. Does anyone have any other suggestions? Did fixing the throttle body solve your stalling problem?

Update from Sep 20, 2013: I picked up my Mariner late this afternoon. I have no idea what a throttle body is but they replaced it. I did not have any problem with the dealership. It was SGI Warranty and American Mercury Insurance Company themselves that gave me a pounding headache. After literally 35 calls between the Dealership and American Mercury Insurance Company warranty I paid extra for finally came through and paid for the repair. I have nothing but good things to say at this time about Varsity Ford-Lincoln Mercury here in College Station, TX but beware buying an extended coverage plan because American Mercury Insurance Company will give you nothing but the runaround and treat you very rudely.

- ConnieLee L., College Station, TX, US

problem #1

May 042012

Mariner Premium 3.6L V6

  • Automatic transmission
  • 38,500 miles

The car had just been in for service the week before the problem started. The only way we got the problem diagnosed was to drive it to the dealer with the check engine light on. We were told the throttle body isn't part of the power train, so there's no warranty coverage. I don't think a part that fundamental to driveability should fail so soon, and it should certainly be covered under the power train warranty.

I've driven many cars in my life, one all the way to 187,000 miles, when I traded it in,still running well. I've never had a failed throttle body.

- Pat S., Kansas City, MO, US

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