Hi,

Long story short:
I've bought a car (A4B6 2002y.) with replaced ECU and IC without having original ones, IMMO was disabled. I could not adapt them together with VCDS, because original data was missing, so one guy modified ECU's EEPROM (because it is less risky to damage something instead of modifying IC's EEPROM) to match cluster's data. After re-flashing everything is working fine, components and keys are adapted, IMMO working fine, but IC have old VIN code.

Question:
Do I need to recalculate checksums after changing VIN? Or I can just change VIN code and re-flash cluster again? I have encrypted and decrypted backups. If recalculation is needed is there any software for this, or it should be done manually?