slide the top half away from the actual key as it has little locator lugs fitted good luck
Two wire connection in the fob. Open and check both wires are fix in place.
Get you replacement Vauxhall Corsa key fob and many other makes from <a href="http://www.keyfurb.com/?s=vauxhall+corsa"> Keyfurb.com</a>.
on the key fob, turn the key over so that the buttons are on the back. there is a small groove near the blade/key end of the fob. you can prise this open using a small screwdriver or if you're strong pull the blade/key part outward/away from the fob. the remaining key fob can then be split in two to get at the battery. beware that you only have a very short time to replace the battery or the fob will go out of sync with the car.
433.925mhz
Change the battery in your key fob. The directions should be in your owner's manual.
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.
take the thug approach and rip the door off
The battery is a CR2032, Vauxhall part number 90541381.
you get 3 mins to change the battery.
Open the FOB and find out.
Open the key fob and remove the battery which has a # on it, and then buy a duplicate.
take key to dealer for programing they will need also info about car,new key maybe £40