My BMW CAS3 keys were all lost, and I used CGDI BMW basic version to generate dealer key, the software didn’t recognize the car keys. I also tried to degrade the CAS system and failed every time. Do I need to open other authorizations?
CGDISHOP.COM engineer replied:
In general, no need to get other licenses. Just go to match key via OBD directly.
But if it fails to downgrade, you need to use other programmer to read out CAS IMMO data and send to CG technician for modifying.
Tips and guides to program BMW CAS3+ AKL successfully:
Step 1: Read DME ISN
Step 2: Read CAS3+ Key Info after downgrade
Step 3: Program key
Step 4: Test if the key work or not
Reference: BMW CAS3+ to CAS3 Downgrade AKL Programming by CGDI BMW