If the ECM, TCM is non-original, such as replacing used module and not programmed online at the dealer service station or IMMO OFF directly, you will not be able to calculate the 32-byte synchronization code!
Collect ELV authentication data and calculate immo data.
If you use this method, you may need to buy an MQB collector separately.
Way 1: Connect the MQB collector in the vehicle (without removing the ELV module).
Way 2: Connect the MQB collector with ELV module on bench (if you remove the ELV module from vehicle).
Packing List
1set x OBDSTAR MQB Collector