BAVM3 - If it's new and BMW, then it's Dinan to keep the warrantees in place - guess your looking at an S2 upgrade (S3 uncludes turbo) - figure $8-9K - have one scheduled for my 2001 X5 4.4i blue/beige SP when it comes in from the east coast - I'm sure there are other more experienced owners out there who can give you some tips - I'm still learning and have limited choices here in Idaho. Good Luck with it!