KEYDIY KD-X4 + Dismantling-free Clip Add BMW BDC03 Keys

This guide explains how to use the KEYDIY KD-X4 Programmer with the Specific Dismantling-Free Clip to add an original BMW BDC03 key. The OEM key must be pre-soldered according to the wiring diagram for this process to work.

 

Tools Required

KD-X4 5-in-1 Key Tool

BDC03 Dismantling-Free Clip

Soldered OEM Key

Mobile device with KD App installed

 

Connection Setup

1. Open the dismantling-free clip package and identify the four wires: Orange, Black, Red, Brown.
2. Connect the corresponding wires from the KD-X4 programming cable into the clip.
3. Turn on all four switches on the clip.
4. Slightly extend the wire ends for better contact to avoid reading failures.
5. Open the original car key and attach the BDC03 clip securely.

 

Programming Steps

1. Power on the KD-X4 and open the KD App on your mobile device. Go to Bluetooth Settings and connect.

 

2. From the homepage, select IMMO Programming → BMW → Select by Type →  G/U Chassis BDC3/BCP Anti-Theft System → Start Execution → Verify the wiring diagram and confirm proper connections.

 

3. Select Add Key → G Chassis/BDC3 Clone.

Connect the original car key to the KD-X4 via the programming harness.

Tap Read Chip Data → OK. Wait for a successful read.

 

4. Swap to the new OEM key and select Original Key(Non-Vehicle).

Confirm and proceed. Once generation is successful, the key is ready to be installed into the key case.

 

Important Notes

• The OEM key must be soldered beforehand – reading an unsoldered key will fail.
• Ensure all connections are secure to prevent communication errors.
• Use the Mobile KD App’s wiring diagram for visual reference during setup.

 

This method offers a dismantle-free, efficient way to program BDC03 keys using KEYDIY tools.

 

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