One problem related to engine knocking noise has been reported for the 2008 Mini Cooper S. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mini Cooper S based on all problems reported for the 2008 Cooper S.
2008 Mini Cooper S. No engine modification. Loud knocking noise on start up and continues for about 5 mins of driving and then goes away. Mile is under 8900 miles.