How do you know your BMW with CAS4 or FEM? How can you determine what is cas4 or FEM? This may help you Big thanks to Gharu Vijay from the xhorse group https://www.facebook.com/groups/xhorsetools/ Related posts: VW Golf 2014 MQB: Confirmed! VVDI2 done! How to convert xhorse MB key “bonus points” into “tokens” VVDI2 2010 Jetta All Keys Lost: OBD & 5 min Done! VVDI2 and Seat Leon 2013 mqb dash 0556: Success!