One problem related to cooling fan 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.
Generally, I love the Mini Cooper having purchased it in the after market. However, not long after the warranty ran out, I had problems for several weeks with my steering wheel seizing up but an incident in February 2012 sticks out most in my mind since I was on I-95 in the rain and could not adequately steer the car to take an exit. My 11 yr old daughter was with me at the time. I pulled to the shoulder and shut the car off and was able to restart and resume driving. Financially, I could not afford to take the car into the dealer but the condition and work around continued intermittently for a few weeks when I could afford the repair. In early may 2012, I took the car to the dealer for repair and it cost over $1300 to replace the power steering pump. At the time of the repair, it was noted that the cooling fan also needed repair for another $720 -- I just didn't have it. Today, my 2-yr old battery failed apparently due to draining from the fan. For now, I replaced the battery for $249. I will be incrementally getting repairs done, however, in reading some people's experience with the steering pump, I understand that there may be some relevance between the pump going bad and an impact on the fan. I'd appreciate any insights you may have on that possibility. I am reporting this not only for myself but for others who also may be impacted by the pump defect that I am learning is somewhat common. I look forward to the outcome of your engineering analysis. Thank you.