How Change MQB49 5C 5D Key ID with Keydiy KD-X4?

How change VAG MQB49 5C 5D Key ID to match original system in Keydiy KD-X4? This is a frequently asked questions of Keydiy MQB49 function.

Here is the clue.

First of all, need to disassemble and read original key data, then generate a service code.

Keydiy will display two key IDs. Place original key into the KD-X4 induction coil,  it will display key ID and check which ID between these two is the original key ID.

We can write the ID of the original factory key onto the key to…