Technical framing
Think of SFD as “classic” SFD — your tool exports an offline challenge, we transform it into an unlock token using audited infrastructure, and you write that token back.
Latency is dominated by checkout, not cryptography — most customers see results in under a minute.
Where you meet it most
MQB and earlier MQB Evo vehicles frequently still sit on SFD-protected modules depending on ECU software revision.
Always trust the generation readout from your diagnostic session over hearsay or model year alone.
Mis-picked generations are the top reason tokens appear “dead on arrival”.
Delivery format
Successful SFD purchases return the token on-screen plus email artefacts such as TXT and QR for traceability.
You can paste into VCDS-style dialogs or leverage our desktop roadmap for automated writes where supported.
Refund posture follows the policy printed on the pricing page until generation succeeds.
FAQ
- Can one SFD token unlock many modules?
- No — each token maps to the challenge you supplied for that ECU address.
- Does SFD cover trucks?
- When the ECU reports generation 1 — yes. Confirm on-tool before purchasing.