You might need to replace your 2002-2006 MINI Cooper R53 Throttle body if you get a check engine light/limp home mode. Procedure similar for non-supercharged R50.

Buy the throttle body here:
http://ebay.us/BARQti

Pinch clip tool:
https://amzn.to/2IfN2wN

Diagnostic tools that can reset throttle body adaptation:
https://amzn.to/2IeqXyu
https://amzn.to/2VFEYs0
https://amzn.to/2UySnWo