How to Add VAG 5C 5D Key with Keydiy KD-X4 Step by Step?

 Tutorial: add VAG VW Audi MQB49/5C and 5D key using Keydiy KD-X4 key programmer step-by-step.

 

Tools used:

• Keydiy KD-X4 programmer
• Original car key
• 5C 5D dedicated cable or KD circuit board to read key data
• New key to be programmed (5C: original key or KD ZB MQB smart remote;  5D: Must use original key)

Requirement:
Update Keydiy App version to V8.7.1 and KD-X4 firmware version 1.53 and higher.

 

Procedure:

Step 1: Read key data

Select IMMO Programming-VW- 5C/5D Immobilizer Systsem- Start execution
Select Read original car key and generate a dealer key.

Check key wiring diagram.

You’ve got two ways to connect the original key:

1. Use 5C 5D circuit interface board. Remove original key and install the PCB into the circuit board, then connect the circuit board with KD-X4 main unit.

2.Use wire soldering method. Connect original key with a dedicated cable or a modified cable.

Read chip data.

After a successful read, it will generate a service code. Take a screenshot of the service code.

Step 2: Generate dealer key

Then start generate dealer key.
Put a KD ZB remote to the KD-X4 coil.
Generate KD ZB remote successfully.

Step 3: Learn Key
Then we learn key in car.
Connect KD-X4 programmer with the vehicle via OBD.
Go to IMMO Programming-VW- 5C/5D Immobilizer Systsem- Start execution
Select Key Learning function.
Enter number of keys to be learned. All keys need to be learned.

It will ask if it is a smart key, here click Yes. (Click No if it is not a smart key).

Place the original car key close to the induction coil.
Open the vehicle hood.

Confirm vehicle VIN

Keydiy KD-X4 will ask enter the KD service number you have obtained in Step 1.

Select the corresponding service code and confirm.

Learn 1st key successfully.
This indicates that the first key has been successfully learned.

Then stick the second key to the induction coil.
Don’t turn off the ignition until learning is complete.
Key learning completed.

Turn off the ignition switch, wait 5 seconds and then turn ignition switch on.

Key learning finished. Test the remote control and proximity function.

Note: If you perform key learning on 2024 and 2025 models, you will need to unlock SFD gateway before learning key.

http://blog.obdii365.com/2026/01/15/how-to-add-vag-mqb49-5c-5d-key-with-keydiy-kd-x4/