Three problems related to engine and engine cooling have been reported for the 2006 Mercury Mariner Hybrid. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Mercury Mariner Hybrid based on all problems reported for the 2006 Mariner Hybrid.
After having a new water coolant pump (the fourth one in my Mariner Hybrid) and a new throttle body being put into my car by a Ford dealership, my car is still having the same problems. Now a "service emission sys" warning has come on, and being under 150,000 miles still I contacted Ford to see what could be done since it was "fixed" by them but still has a problem related to the electrical hybrid powertrain, and Ford says there is nothing else that can be done, even though it clearly is under the warranty that they created due to the failures of both parts.
Car would not move at all after coming to a stop when making a left turn in the middle of an busy intersection. With the car idling at 1000 rpms, it would not move when I pressed the accelerator. I had to shut the vehicle down completely, restart it, and then it would move forward only if I pressed the accelerator immediately after restarting. If traffic did not allow immediate travel, the car would not move forward as previously described. If you could not proceed immediately this cycle would continue multiple times. This has happened on over 30 separate occasions with this vehicle. This problem caused multiple safety risks from side or rear end collisions.
Sudden abrupt stoppage of gas motor (in hybrid vehicle) with slowing to < 30 mph while in freeway driving. Without warning, the motor simply cut off.