Great news: The latest Xhorse VVDI Key Tool Plus database now supports manual unlocking of VAG/Audi SFD security gateways.
This guide outlines the step-by-step process for unlocking SFD-protected control units, enabling vehicle diagnostics and key programming.
Applicable Devices:
VVDI Key Tool Plus
VVDI Key Tool MIDI
Before You Begin:
Ensure your device database is updated to the latest version.
Note: Automatic SFD unlocking is not supported – you must obtain the calculation code manually from a third-party service.
3-Step Unlock Process:
Step 1: Get Vehicle Seed
① Select “Unlock SFD” on your VVDI device
② Scan the displayed QR code to access vehicle data
③ Obtain the SFD seed code through OBD connection
Step 2: Calculate Unlock Code
① Send the seed code to a third-party calculation service
② Receive the corresponding response code
Step 3: Complete Unlock
① Enter the response code into your VVDI device
② Confirm “Unlock Success” notification
③ Gateway remains unlocked for 90 minutes for key programming and diagnostics
Important Notes:
① SFD1 only – Does not support SFD2
② The entire process requires manual code calculation
③ Ensure stable vehicle connection during operation
④ Use the unlock window for dealer key generation and key learning
After Unlock:
Proceed with key programming functions within the 90-minute access period.
