If failed to downgrade BMW CAS3++(istap) with Xhorse VVDI BIM Tool Pro and data corrupted after programming key via OBD. BIMTool has a option to repair BMW CAS3++.
OBDII-CAS3+ISTAP Repair
For suddenly condition cause CAS enter service mode while update ISTAP*, select this type to repair
(OBDII-CAS3+ ISTAP Version).
You need know CAS ID before continuing. You can input the CAS ID or load EEPROM for read CAS ID.
Use the known CAS ID to repair: if you have record CAS ID before update CAS flash can use this way.
Use the CAS EEPROM to repair: If can
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