One problem related to power steering pump has been reported for the 2008 Mercury Mariner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mercury Mariner based on all problems reported for the 2008 Mariner.
I drove into a parking lot and all of a sudden I could not steer the vehicle. It was like having 4 flat tires at once. No warning signals from the dashboard. After turning the vehicle off and restarting later I could steer it home. On the following Monday the 25th of November, I took it to a local mechanic I know and he decoded a power steering sensor malfunction. The whole steering column had to be dismantled to put in the new electric power steering pump. What happens if these units go out when you are doing 70 mph on the interstate? my cost was $1262. 43 I will never buy a Ford product again.