Purchased addl. E53 key, programmed, first key stops working

[ScottJ]

Odd

Only had 1 key when I purchased the X5, so bought an additional one from dealer.

Did initializing procedure on new key, works, ignition start and keyless entry/alarm.

But now my alarm/keyless entry features stopped working on first key.

I do initialization procedure on first key, it works again fully.

Seems vehicle will only allow keyless entry/alarm via one key at a time!

Both keys will start vehicle.



Help! Dealer confused also.


Scott

[ScottJ]

Fixed, both require programming in the 10 sec window.

[Qsilver7]

Thanks for posting back operator error.

Indeed, both keys must be done during the same session, and within a specific time period...AND...do NOT insert the 2nd or any other key into the ignition. If you insert another key in the ignition to initate programming...any key previously programmed will no longer work unless you proceed to reprogram it during the same session...starting on STEP #3 where it says to start pressing the buttons.

In fact, if you ever lose a remote key...you should reprogram your remaining remote, then if you get another remote, reprogram them again. This will cancel remote lock/unlock abilities of the lost remote key. Obviously, you can still walk up to the vehicle and insert the key manually...but all remote operation will no longer work if the other remotes have been reprogrammed. The GM III assigns new rolling code tables to the remote keys when the initializing sequence is initiated (STEP #2).

Simple rules...but they ALL must be followed specifically as written.

[ScottJ]

thanks for the addl. info!