One problem related to engine cooling system has been reported for the 2003 Mitsubishi Lancer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mitsubishi Lancer based on all problems reported for the 2003 Lancer.
We have a 2003 Mitsubishi Lancer and the hot/cold switch broke off. In trying to research this, I literally found 100's of online complaints about this problem. We live in mn, and it is not possible to get the windows to defrost in the vehicle due to this problem. That is a huge safety issue. The company should be doing a recall fix on these. . . Since getting it fixed doesn't fix the problem at all, the switch behaves the same way after about 90 days of use.