One problem related to radiator has been reported for the 2005 Mini Cooper. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Mini Cooper based on all problems reported for the 2005 Cooper.
In September 2012 I noticed a loud fan noise that wouldn't turn off. The car was also overheating. I noticed that it was very hard to steer the car, but I thought that was due to the overheating. Mechanic determined failed cylinder head gasket in 11/2012. The radiator was replaced and the thermostat was replaced. In 11/2012 the water pump was also replaced. In 12/2012 the battery had to be replaced. In 06/2013 the heater core was replaced. I believe that these issues are directly related to the loss of power steering and the associated fan failing, which caused the car to overheat and the battery to fail. Please see nhsta complaints 10453158, 10444328, 10379750, 10442431,10379459 for similar cases of these same issues related to the failure of power steering and the associated pump.