Protection of vehicle diagnostics
SFD („Schutz der Fahrzeug-Diagnose“) is an access and rights management system of the Volkswagen Group, by which certain diagnostic functions on control units are only permitted with the appropriate rights.
SFD was introduced with the MQB2020 (MQBevo) platform. To gain access to modifications/coding, the control unit must be unlocked with a special SFD token, which can currently only be obtained via an official UMB account (GeKo/partner company account).
SFD aims to increase security against modifications in networked vehicles. It will be introduced in two stages: Level 1 protects access to specific write services, while Level 2 provides additional tamper protection of diagnostic content.
The SFD process usually requires an online connection of the diagnostic tester. Control units such as BCM (electronic central electrics, body control module), gateway and information electronics are affected.
The SFD function is currently available in models such as the Audi A3 8Y, VW Golf 8 and ID.3. The gateway with the VAG part number 5WA 907 530 indicates a vehicle with SFD.
VCDS supports work with SFD, provided the required SFD tokens are available. A procurement option outside of a UMB account at Volkswagen is in progress.
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