Vehicle suddenly loses power steering assistance while driving. If the ignition key is cycled the power steering assist may function again. The affected component was determined to be the power steering control module (pscm) within the steering column. A recall was issued for this in 2014, however only the software was updated when the vehicle was brought in for repair. The malfunctioning components were not replaced and the issue has returned.

- Rockford, MI, USA

I purchased my 2009 Mercury Mariner in 2015! recently, as I was unaware of the recall with Ford a few years back, I've had front and rear bearing issues! also my ballpoints were defected and my control arms! my tire pressure sensor fault stays on! I've taken my 2009 Mercury Mariner to star tire's best one auto & tires and had my ballpoints, front and rear bearings, control arms, and front wheel alignment repaired totaling in $780! three days later on the date of 11/11/2017, my power steering assist fault came on! my 2009 Mercury Mariner was stationary and was extremely difficult to turn!

- Lafayette, IN, USA

While in motion the car will stall causing me to pull off to the side of the road, turn the car off, then back on in order for it to work again. This happens every 10-15 miles and its really unsafe! I believe it is a defective throttle body and needs to be fixed asap before I can continue driving it.

- Bradenton, FL, USA

I was on my way home in my 2009 Mercury Mariner and my car started slowing down and was acting as though it was going to cut off. There was nowhere immediately to pull off and it was a very dangerous road. Finally after 5 minutes of praying and trying to keep going (very slowly) I made it to pull over. I turned off the car and started again and was able to make it home. I am reading online where this happens often to these makes and model. Its a throttle module issue. I am going to take it to the dealership in town tomorrow, but I honestly am very disappointed and disgusted that I may have to pay for a issue that seems to be common in this car. I bought the Ford because it was american made and I felt it would be dependable. I am very discouraged. I usually try to stick with the brands I find to be the best and when purchasing in the future, I am unsure I can trust Ford if there are known issues with vehicles but nothing done about them for its customers. It like buy and good luck.

- Greenville, SC, USA