VAG VW Audi Skoda Seat MQB48 NEC35XX all keys lost require uploading sync data to proceed. Autel, Xhorse all require 3rd party to calculate sync data. Launch X431 x-prog3 has an integrated mqb2 calculator.  There is now a MQB sync … Continue reading How to Calculate MQB Sync Data with Launch X431 Built-in Calculator?