Dieselschrauber SFD-Checker – Which SFD Level Does My Vehicle Have?

Upload your VCDS Autoscan or paste its contents. Our tool analyzes which control modules in your vehicle are protected by SFD or SFD2 and whether coding or adaptations are possible.
No registration required – just paste your Autoscan and analyze.

The Dieselschrauber SFD-Checker analyzes your VCDS Autoscan for SFD and SFD2 protection. Simply paste the Autoscan from any VCDS version or upload the .txt file — analysis is instant and requires no registration.

What is SFD and why is checking important?

SFD (Schutz der Fahrzeug-Diagnose, "Vehicle Diagnostic Protection") is a security mechanism in modern VAG vehicles (VW, Audi, Seat, Cupra, Škoda) that restricts access to control modules. From model year 2020 onwards, many vehicles on the MQB-evo and MQB37W platforms use SFD or SFD2. Without SFD unlock, coding, adaptations, and certain diagnostic functions are blocked. Our SFD-Checker evaluates the VCID suffixes in the Autoscan and shows you precisely which modules are affected — based on the official Ross-Tech SFD documentation.

SFD Topics in the Dieselschrauber Community

• SFD Unlock VW/Audi/Seat/Cupra/Skoda in the Dieselschrauber Forum
• SFD2 vs SFD Differences, Models, Model Years in the Forum
• VCDS SFD Buyer's Guide in the Forum

SFD Unlock in the Dieselschrauber Shop

Need an SFD or SFD2 unlock? As an official Ross-Tech distributor, we offer SFD registration for HEX-V2 and HEX-NET interfaces. Visit our VCDS Diagnostic Functions page for details on SFD/SFD2 unlocking and all other VCDS features.