astra 05 reg. key fob does not work central locking. also when drivers door is opened an alarm will sound (similar to when you leave your lights on) and when i insert the key into the drivers door it does not lock or unlock all doors (just drivers door) but the button inside the car activates central locking. please help!!! thanks

buster moves, August 2009

Look in the owners hand book for instructions on key re-sync. and battery change.
On older models you just put the key in the ignition, turn it til the dash lights come on then press the lock button on the key. The doors should lock then unlock. You might have to press and hold the button a few times for it to work. I believe it's the same on yours, wont do any harm if not.
I think it's just a watch type little round battery in the remote (cr2032?) I got mine in tesco.
Have you tried the spare key?

Good luck,

Sal

astragalsal02, August 2009

Try replacing the battery in the fob. You can get cheap ones on ebay. The alarm that sounds when you open the door is a safety feature it usually sounds when you open the door with the keys in the ignition. Alot of old astras only locked the drivers door with the key. Best thing to do is get the remote fixed either new battery or needs reprogramming. Try battery first.

Donna Campbell, August 2009