The current key programming process for VW/Audi MLB system (most devices only do add key) is:
- 1. Disassemble the customer’s original key.
- 2.Use MLB tool (Xhorse VVDI MLB Tool, KYDZ MLB Tool or Keydiy KD-MP MLB Tool) to read and calculate the CS from the key (this applies to MLB vehicles like the Volkswagen Touareg, Porsche, and Audi). After a successful calculation, this data can be used to generate a dealer key and be learned.
However, vehicles with the MLB system from 2023 onwards are somewhat different from previous ones. You can only use the calculated data to generate a key, but you cannot perform the learning process. While you can still calculate the CS data from an existing key, this data can no longer be used to directly “learn” a new key onto the vehicle via aftermarket tools.
Therefore, for programming keys on post-2023 MLB Audi vehicles, the current procedure is to:
Method 1:
First, record all the original key IDs from the vehicle. Then, use a brand new original (OEM) key with an uninitialized ID (FFFFFFFF) to generate an OEM key, or directly use an aftermarket MLB key that allows its ID to be changed to generate a key with the ID of the customer’s lost key.
Finally, use original manufacturer’s equipment (ODIS) to perform the key learning.
Method 2:
Another method is to find someone to unlock the SFD (Sicherheitsfahrbereitschaft – Security Vehicle Readiness) security gateway on the vehicle. After the SFD is removed, you have a half-hour window to use MLB devices (VVDI2/Key Tool Plus/KD-X4 etc) to perform the key learning.
Here is an example showing how to unlock VAG SFD then add key with KD-X4 key programmer.
The SFD unlock token was provided by a 3rd party technician (via WeChat: geko12345 ).
For 2023 onwards Audis, you can only use keys whose ID can be changed. The new key’s ID must be changed to that of the lost key ID. Then, use the CS and password read from the original key to generate the dealer key. You cannot arbitrarily generate a key with a different ID.
