2003 BMW 3 Series Keyless Entry Remote Fob Smart Key Programming Instructions
Note: This procedure will only program the remote portion of the key. You will need to get the key cut and the transponder programmed.
1. Working from within the vehicle and with the doors shut
2. Turn ignition to position 1 and back to off within 5 seconds.
3. Remove the key from ignition and press and hold the unlock button for 15 seconds during this time press the key lock button 3 times within 5 seconds.
4. Release both buttons.
5. Doors will lock and unlock to show correct programming has occurred.