Key fob failing?

[DuncanR]

What is with the re-synchronsing? Do the keys stop 'talking' to the car if they have not been used for a while.

Pip

All your keys get reprogrammed at the
same time. Here is how it is done
1. Open the car doors using the remote function of your working key.
2. Get in and close (don't lock) all the doors.
3. Put the key in the ignition and switch momentarily to position 1 which is
the first position when you turn the key clockwise. This is the accessory
position. Don't stay in position 1 longer than 5 seconds; then turn the key
back to the off position.
4. Remove the key.
5. On the key transmitter, press and hold the unlock button. Press and release the lock button three times within 10 seconds while still pressing the unlock button.
6. release the unlock button.
7. The system indicates re-programming by locking and immediately unlocking
the door locks.
8. If you want to do more remotes, you must do each within 30 seconds of
step 7 for the preceding key. You just need to repeat steps 5 through 7 for
each key after the first."
__________________
X5, E46, E38 & E39 Diamond Shaped Key

To carry out this procedure you need to have one working key and one key which requires programming. Please read on if you do not have a working key as this is also covered further down. It may help sometimes to hold the key close to the rear view mirror as this is where the sensor is located in most models.

1. With both keys, get in the car and close all windows and doors.
2. Put working key into the ignition and turn to position 1 (the accessories should turn on)
3. Turn the key back to position 0 and take the key out of the ignition.
4. Using the working key, hold down the unlock button, press the BMW logo (lock button) 3 times, and release the unlock button. Doors should lock and unlock.
5. With the new key, hold down the unlock button and press the BMW logo (lock button) 3 times and let go of the unlock button. Doors should lock and unlock and you're done!!

Alternate Procedure:

1. Switch ignition on and off within 5 seconds, with all doors closed.

2. Take key out of ignition and press unlock button. Hold unlock button whilst pressing the lock button 3 times, all within 10 seconds.

3. Release unlock button.

4. The system recognises re-programming by locking and immediately unlocking the doors.

5. You have to do your other keys within 30 seconds after reprogramming your first key by following steps 2,3 & 4 only.

Alternate procedure if above doesn't work or if you do not have a working remote:
1. Turn key to position 1 five times very quickly
2. Remove key
3. Hold unlock button then press lock button 3 times, release unlock button.
4. If you have another key do the same button pressing within 30 seconds
5. Turn on ignition to finalize

[Bounce]

All your keys get reprogrammed at the
same time. Here is how it is done
1. Open the car doors using the remote function of your working key.
2. Get in and close (don't lock) all the doors.
3. Put the key in the ignition and switch momentarily to position 1 which is
the first position when you turn the key clockwise. This is the accessory
position. Don't stay in position 1 longer than 5 seconds; then turn the key
back to the off position.
4. Remove the key.
5. On the key transmitter, press and hold the unlock button. Press and release the lock button three times within 10 seconds while still pressing the unlock button.
6. release the unlock button.
7. The system indicates re-programming by locking and immediately unlocking
the door locks.
8. If you want to do more remotes, you must do each within 30 seconds of
step 7 for the preceding key. You just need to repeat steps 5 through 7 for
each key after the first."
__________________
X5, E46, E38 & E39 Diamond Shaped Key

To carry out this procedure you need to have one working key and one key which requires programming. Please read on if you do not have a working key as this is also covered further down. It may help sometimes to hold the key close to the rear view mirror as this is where the sensor is located in most models.

1. With both keys, get in the car and close all windows and doors.
2. Put working key into the ignition and turn to position 1 (the accessories should turn on)
3. Turn the key back to position 0 and take the key out of the ignition.
4. Using the working key, hold down the unlock button, press the BMW logo (lock button) 3 times, and release the unlock button. Doors should lock and unlock.
5. With the new key, hold down the unlock button and press the BMW logo (lock button) 3 times and let go of the unlock button. Doors should lock and unlock and you're done!!

Alternate Procedure:

1. Switch ignition on and off within 5 seconds, with all doors closed.

2. Take key out of ignition and press unlock button. Hold unlock button whilst pressing the lock button 3 times, all within 10 seconds.

3. Release unlock button.

4. The system recognises re-programming by locking and immediately unlocking the doors.

5. You have to do your other keys within 30 seconds after reprogramming your first key by following steps 2,3 & 4 only.

Alternate procedure if above doesn't work or if you do not have a working remote:
1. Turn key to position 1 five times very quickly
2. Remove key
3. Hold unlock button then press lock button 3 times, release unlock button.
4. If you have another key do the same button pressing within 30 seconds
5. Turn on ignition to finalize

Or get some fooker else to do it.:hahaha:

[billyboysm3]

when i got mine back it was fine and didn't need to re sync.