It can be coded, Macht Schnell and KW also sell code delete modules.
If you don't use a module you will have an error light on your idrive / dash. It's not a huge deal; more annoying than anything. I lived with it for 6 months. I just put my EDC shocks back on and my error light went off but then it returned. I'm not sure if it's related but the dealer diagnosed it as a module failure.
'13 M3 - Silverstone II - Sold
'04 M3 - Jet Black - BBS E88, KW Clubsports
Last edited by slicer; 12-15-2012 at 08:45 PM.