One problem related to electrical failure has been reported for the 2005 Mini Cooper S. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Mini Cooper S based on all problems reported for the 2005 Cooper S.
The vehicle has loss the power steering assist due to power steering pump failure. Thus requiring increased force to steer and control the vehicle. Steering has becomes extremely difficult and has made manoeuvring this car far harder and dangerous. The car has spotty electrical failures; example the window just doesn't want to roll up; no, wait, it does. No, wait, it doesn't. The stereo just gives up; no sound anymore,then it plays again. The same with the drivers side door you could here it unlock and re-lock, but the door would not open and then it would. Also both of my keys to open the door both turned off at the same time and I had to have the keys re-calibrated at a Mini dealership to reopen the vehicle.