Mercury Mountaineer multiple issues including driver's seat motor failure, rear window motor malfunction, heater blend door problem, steering controls not working, transmission failure, leaking intake, and cracked lift gate on Mercury Mountaineer

Some Mercury Mountaineer owners report experiencing a variety of issues, including driver's seat motor failure and rear window motor malfunction. Additionally, concerns have been raised about heater blend door problems, non-functional steering controls, and transmission failure. Other reported issues include leaking intake and cracked lift gates, which have contributed to worries about the vehicle's overall reliability. The Mountaineer has faced significant body and transmission concerns, particularly in the 2005 model year, which has been associated with complaints regarding body/paint, transmission, and seat belts/airbags. It is crucial for Mountaineer owners to be aware of these common problems and consider seeking local repair options to address them promptly.