One problem related to sun roof has been reported for the 2001 Mitsubishi Diamante. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Mitsubishi Diamante based on all problems reported for the 2001 Diamante.
Leaking sunroof. The factory sunroof leaks during rain and washing. It has caused water damage to the headliner. Also the rear drivers side windows rattles and has excessive wind noise. The dealer wanted $90 just to take the door panel off I refused because I don't feel I should pay for manufacture defect. As far as the sunroof goes an attempt was made to replace the sunroof glass but the leak still persists in the same location.