Two problems related to coolant leaking have 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.
For no particular reason my car fills up with the smell of anti-freeze coolant when I turn on the heater. I have read that this is caused by leaking 0-rings and that this will damage the computers which are underneath the leak. The car is a 2001 Mitsubishi Diamante l. S. The dealer says it is not a common issue. Google says otherwise.
Smell of anti freeze 3 months ago while heater was running. Windows starting to fog and unable to defrost/defog. Will have to schedule a repair with the dealer. This is a major safety concern as coolant vapor is toxic to breathe and electrical control components to engine may be damaged if leaking into electrical connections or devices; traction control and throttle control being the most dangerous and possibly fatality causing.