One problem related to wiper has been reported for the 2003 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mercury Mountaineer based on all problems reported for the 2003 Mountaineer.
Back hatch glass exploded while the vehicle was stationary (parked in a parking log), and the driver was closing the hatch. Back glass portion of hatch was being manually closed at a slow-moderate rate, and glass suddenly shattered without warning. There was no impact to the glass, nor any discernible reason why the glass should have suddenly shattered. Approximately 90% of the glass ended up in the car or on the parking lot surface, with only about 10% of the glass remaining attached to the hatch frame and struts.