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[Elliott19864]

I just got my omega yesterday and the guy said the key fobs don't work, one stopped and the other was dropped in the sink.

One of them has a slight sign of life when you press the buttons, the lights illuminate for a split second and then won't for a few seconds after, pointing towards a dying battery inside.

What's the chances of it working if I get a battery? And is there a way to recode them manually?

[tunnie]

What age is the car?

[TheBoy]

You can recode keys that have already been programmed to this car.  You need a Tech2 to program a different fob to it

[Entwood]

IMHO your best bet is to send the keys to Martin Imber

http://www.omegaowners.com/forum/index.php?action=profile;u=12

He does an excellent job of mending them, and they then don't need any recoding .. give him a PM

[albitz]

The one which has some signs of life sounds like it might just need a battery.Put new battery in,put key in ignition and switch ignition on (no need to start engine) then press one of the buttons for a couple of seconds.Doors should lock/unlock - job done, key programmed.
If that doesnt work - it needs more than just a battery.

[Elliott19864]

Its a 1998, no biggy if it doesnt work as the key still works in the door, just not 'convenient'.

Is there any chance of it going badly wrong using the above technique? Alarm/immobiliser not liking it?

[Rods2]

No, the immobiliser uses a small RF chip glued to the front shell of the key and is completely separate to the central locking system. As suggested above, change the battery and re-synchronize the key using the previous instructions. Battery holder terminals breaking and button problems are quite common, if this is the case then contact Martin Imber for a repair.

[Bionic]

Replace the battery as quickly as you can once you remove the old one cos it gives you about 15 seconds before it loses its memory. Do it quick enough and it will not need resetting. Battery is a 2032 button cell (and put it in the right way up)