SFD affects vehicles from the Volkswagen Group, starting around 2019/2020.
Betroffen sind Audi, Cupra, Seat, Skoda, VW und die Nutzfahrzeuge. Platforms:
Golf 8, the ID. models, and other MQB-evo platform vehicles.
Important for practical application: not every vehicle from 2019 is affected. A model with an older platform might be exempt, while a newer model of the same series might not. The question is not just the year of manufacture, but whether the vehicle's control unit uses the SFD (Software-Defined Data) technology.
See SFD Checker:
https://shop.dieselschrauber.org/en/sfd-checker.php
For the workshop, this means: check first, then proceed. A complex coding attempt without prior authorization will fail, and that wastes time.
https://shop.dieselschrauber.org/en/vcds-sfd-abo-p-367.php
Discussion of vehicles affected in the board meeting:
https://community.dieselschrauber.org/en/viewtopic.php?t=31009