You will require changing all the pre-tensioners in the car and car's battery safety terminal as well to reset the airbag module.
If the car has been involved in three or more accident then you may require new airbage module or wiping the memory of the current airbag module.
Not sure about LCI changes on M3, but pre-LCI spare parts will work out cheaper for you in this instance.
Away for 4 weeks. PM only if its urgent.
Last edited by makkan00; 01-21-2013 at 12:11 PM.