If you need to add a smart key to a 2023 BMW 5 Series equipped with the BDC3 immobilizer system, the LONSDOR K518PRO combined with the LONSDOR ADP40 and BDC3 Solder-Free Adapter provides a convenient and efficient solution. Follow the steps below to generate and program a new dealer key.
Required Tools
- LONSDOR K518PRO Key Programmer
- ADP40 Adapter
- BDC3 Solder-Free Adapter Board
- Original Working Smart Key
- New Blank Smart Key
Step 1: Collect Data from the Original Key
1. Open the original smart key and remove the chip.
2. Place the chip onto the BDC3 adapter board.
3. Connect the adapter board to the ADP40, then connect the ADP40 to the K518PRO.
Step 2: Generate the New Smart Key
1. On the K518PRO, select: Generate Smart Key → BMW → G Chassis → BMW G BDC3
2. Insert the new blank smart key into the card slot.
3. Tap Generate and wait for the operation to complete.
4. After successful generation, return to the main interface.
Step 3: Create the Dealer Key
1. Navigate to: IMMO & Remote → BMW → Select from Type → BDC03 → BDC3 Key Copy (Encrypted)
2. Make sure the device is connected to Wi-Fi.
3. Select Read Working Key to obtain the original key data.
4. When prompted, save the generated data file.
5. Next, choose To Use Lonsdor Key.
6. Place the newly generated smart key flat on the card slot and press OK.
7. The K518PRO will automatically generate and lock the key as a dealer key.
Final Verification
After programming is completed, test both keys on the vehicle.
- Verify that the engine starts normally.
- Check the Lock and Unlock functions.
- Confirm that both the original key and the newly added key operate correctly.
Why Choose LONSDOR K518PRO?
LONSDOR K518 Pro key programmer offers a streamlined solution for BMW BDC3 key programming. By integrating smart key generation and dealer key creation into a guided workflow, it helps locksmiths and automotive professionals perform BMW key addition jobs more quickly and efficiently while reducing the complexity of the process.