Here is the pinout to read Audi BCM2 immobilizer with xhorse vvdi prog.
Pinout BCM2 AUDI A5
Car models: Audi A4 2009-, A5, A6 2012-, A7, A8 2011-, Q5, Toureg 2011-
Make sure you choose correct MCU.
Use this diagram and choose the right mcu.
Don’t remove any components from the board and the connection is same as picture.