How to Add 2014 BMW X4 Smart Key with Lonsdor K518 Pro?

Understanding how to program a 2014 BMW X4 smart key with Lonsdor K518 PRO is essential for automotive locksmiths looking for an efficient OBD-based solution. This technical guide covers the complete procedure for adding a new key to the CAS4/CAS4+ system without the need for complex pre-processing in most cases.

Preparation & Tools Required

Lonsdor K518 PRO Key Programmer
OBD Communication Cable
Original Working Key
New BMW Smart Key

Step-by-Step Instructions

System Identification

Connect the K518 PRO to the vehicle via the OBD communication cable.
Navigate to the menu: Immo & Remote > BMW > Select from type > CAS4/CAS4+ > Method 2 (OBD).

Read CAS & Key Data

Select “Read Key Data” to allow the tool to analyze the current vehicle status.
Turn on the ignition switch when prompted.
The system will automatically check if the vehicle requires pre-processing; for the 2014 X4, this is typically not required.

Backup Coding (Safety Step)

Select: Backup and Restore Code > Backup Code.
Ensure the ignition is on and save the file with a recognizable name.
Once the “Backup Successful” message appears, return to the main menu.

Generate Dealer Key

Select “Make Dealer Key”.
Turn on the ignition switch and the hazard warning lights.
Choose an empty key position (e.g., Key Position 4).
Select: Immo Coil Generation > Have Original Key

Key Induction & Learning

Place the original working key near the car’s induction coil and click OK.
Immediately hold the new smart key close to the induction coil.
Wait for the device to finish “Writing New Key.” Do not move the key during this process.
A success message will appear once the dealer key is generated and locked.

Verification & Testing

Check the device screen to ensure the ID for key position4 is now displayed.
New Key: Press the brakes and the Start button. The engine should start successfully.
Original Key: Repeat the process to ensure the original key still functions perfectly.