One problem related to engine cooling system has been reported for the 2003 Mini Cooper S. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mini Cooper S based on all problems reported for the 2003 Cooper S.
2003 Mini Cooper S with power steering failure. Power steering goes in and out. Car radio turns on when car is off and no key is in the engine, causing battery to drain. Once my power steering went out when I was leaving a parking area causing me to hit the car in front of me. I have not repaired damages. I have however replaced the engine due to faulty wiring in aprox 2009. A fuse that runs everything for cooling blew and gave me no warning the engine was overheating.