One problem related to catalytic convertor has been reported for the 2000 Chrysler 300M. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Chrysler 300M based on all problems reported for the 2000 300M.
Vibration noise coming from engine when car is in drive/reverse at low rpm 1000-1500 rpm. Tested and seems to come from catalytic converters.