Get you replacement Vauxhall Corsa key fob and many other makes from <a href="http://www.keyfurb.com/?s=vauxhall+corsa"> Keyfurb.com</a>.
The battery is a CR2032, Vauxhall part number 90541381.
Put key in ignition. Turn key till dash warning ligth come on. Press "open" button on fob. If it works the locks will go down and up to show it has worked.
By design, they can only be programmed by those possessing the correct equipment. If this were not so, anyone could buy a fob, program it to a vehicle, and then disable the alarm.
433.925mhz
It needs to be done by a dealer. Otherwise someone could buy a fob, program it to a car them self & then drive the car away without the alarm going off.
does your key have a button or two on it? if so this may be a give away, however if the button dont seem to do anything then usually its possible to get the keys apart and do a battery change, however some keys require a manufacturer check up or replacement ( usually not cheap! ) if however your key does not have a button or you dont have a fob then you may well not have central locking, best thing to do is phone vauxhall and tell them your registration and they will tell you if you should have it and may send you a fob for a fee ( again not cheap, in some cases you may be looking at £40 quid plus.
Two wire connection in the fob. Open and check both wires are fix in place.
you get 3 mins to change the battery.
what is the replacement battery for a 2003 Honda accord key fob
your key fob can only be programed by the local gm dealer.
cr2016
get a new one :I lol