[Efthreeoh]

I finally got around to reprogramming all my keys for my Z4. I used the instructions originally posted by boca1 (gracias). I found the instructions a little confusing so I decided to rewrite them for clarity. Hope this helps.

General Notes: If you have multiple keys for your Z4, you must program (or reprogram) all the keys for the car. Once a new key is programmed, the other working keys you already have are now deprogrammed, so all the keys need to be programmed together in succession (using Method 2).

Method 1:
1. Working from within the vehicle and with the doors shut;

2. Insert the key in the ignition and turn ignition to Position 1 and back to Off within 5 seconds.

3. Remove the key from ignition and press and hold the key 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.

Method 2:
To do this procedure you need to have one working key and one key that needs to be programmed.

1. Get in and close all doors.

2. To start the programing process, insert the 1st key into the ignition and turn on the ignition and turn off quickly (no more than 5 seconds). The next actions must be completed within 30 seconds.

3. Remove the 1st key from the ignition.

4. Hold the 1st key up near your left shoulder (which places the key closer to the remote receiver antenna).

5. Hold down the key Unlock button and press the key Lock button 3 times. Release the key Unlock button and the doors lock which confirms the operation.

6. Quickly repeat steps 4 & 5 for Key #2 etc.

If it does not work, try doing the keys in opposite order. Key 2 then key 1, vs 1 then 2.

Method 3:
Alternate method if you do not have a working remote:

1. Turn the ignition with a key to Position 1 five (5) times very quickly.

2. Remove key.

3. Hold the key Unlock button then press the key Lock button three (3) times, release key Unlock button.

4. If you have additional keys, reprogram them using the same button pressing sequence within 30 seconds.

5. Turn on ignition to finalize.

PLEASE NOTE: This programming procedure programs the remote-control part of the key. Any transponder chip for the immobilizer (starting of car) will not be programmed and must be done by a specialist.