One problem related to o2 sensor has been reported for the 2006 Mini Cooper S. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Mini Cooper S based on all problems reported for the 2006 Cooper S.
The O2 sensor failed on my car. Mini issued an extended warranty on 2006 models but my VIN was not included. This is ridiculous that I have the exact same issue but my VIN is not included.