Two generations, two pipelines
SFD relies on a challenge-response flow we can compute automatically inside hardened backend infrastructure.
SFD2 is materially harder — tokens are sourced manually via trusted suppliers, which is why delivery takes hours and pricing reflects operator time.
Neither bypasses the need for a fresh offline challenge from the vehicle.
How technicians spot the generation
Modern tools surface explicit generation labels during security routines.
If you only see binary locked/unlocked states, repeat the SFD dialog after updating firmware — OEM wording shifted mid-cycle.
Never infer generation purely from VIN decoding forums; ECU part numbers and flash families matter.
Checkout implications
Guest checkout forces an explicit generation toggle — double-check before submitting payment.
Volume customers should segregate prepaid buckets per generation to avoid accidental debit.
When migrating fleets, document generation per module ID for repeatability.
FAQ
- Can I upgrade an SFD token to SFD2?
- No — place a new order with the correct generation and challenge.
- Which is cheaper?
- SFD is lower priced thanks to automation; SFD2 reflects manual sourcing.