One problem related to transmission noise 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.
My 2005 Mini had aprox. 77,000 miles on it when I had drove for about an hour, pulled into my driveway, heard a loud noise, and when I got out I saw a piece of the transmission casing laying on the ground and all the fluid drained out. There are 95 Mini owners that I know of who have had 1 or 2 transmissions replaced after only a few years of use. Mine cost me 5,000 dollars and loss of use for 2 months. Mini was aware of the faulty transmissions and continued to sell them. I really believe there needs to be a reckoning.