I noticed my big key fob with buttons used to immboizle the car and had to use the spare key, what would cause this and what would it take to get it working again.
There's a transponder in the key isn't there? You've not had the key open have you? I think you can switch the transponder from the spare in to the main if the main one packs in, though I'm sure someone will be along shortly to correct me 
I've not disassembled mine, so I'm not 100% sure, but the ones for my bike were similar (though obviously we don't have to unlock the doors ). Basically, the keys split in two. Inside of the one with the remote controls will be a battery and a transponder (which was passive on the bike, I'm sure it is on the Leon too). Inside the other will just be a transponder. It is this transponder that the immobiliser recognises and okays the engine to start.We found on the bikes that if one of your keys break (ie snap/bend) and you don't want to pay for a full key, you can get a simple blank cut to match and just hold the transponder-key (the original) close to the ignition barrel and it will start. If the new key has space for a transponder, you just take it out of the original and put it in the new one.
In the case of these keys, assuming they work the same (and I can't guarantee it) you will be able to open both and swap the transponders so that the spare key is no use beyond opening the doors but the main remote-key would start the car again.
As I say, I can't be 100% sure, but I can't see any reason why it would be any different. It's a fairly standard system.
Does that all make sense? I'm tired and rambling
I know what you mean now aslong as its near the pickup on the barrel, but it wont and both keys are on the same ring.
The keys as you know come in 2 parts:
Remote fob
Key blade
The fob is purely for remotely opening the doors and disabling the alarm where as the flip key blade part houses the transponder which disables the immobiliser. If one works but the other doesnt it is likely that the transponder is currupt or missing. You can open the flip key blade but you have to remove the seat badge and there's a screw under it and the transponder shoud be a little glass pellet or plastic chip (like an eeprom). It might just be that it needs re-coding, this can be done by the likes of a dealer or key-facts in duckenfield.
Remote fob
Key blade
The fob is purely for remotely opening the doors and disabling the alarm where as the flip key blade part houses the transponder which disables the immobiliser. If one works but the other doesnt it is likely that the transponder is currupt or missing. You can open the flip key blade but you have to remove the seat badge and there's a screw under it and the transponder shoud be a little glass pellet or plastic chip (like an eeprom). It might just be that it needs re-coding, this can be done by the likes of a dealer or key-facts in duckenfield.
Well ive lost it all together now if i buy a 2nd hand one off ebay can it be coded so it will open the doors? You put the ignition on with one key dont you then press the buttons, all i have now is a spare key :|
if i buy a 2nd hand one off ebay can it be coded so it will open the doors? You put the ignition on with one key dont you then press the buttons, all i have now is a spare key :|
I bought a spare key off ebay. it was from a mk 4 golf costed £26 and it worked. The electric part can be coded as many times as you like but the glass transponder only once. I also bought at the same time a new glass transponder and fitted that. Took it to dealers and they programmed it for 45 quid!!
You can programme the electric part yourself to open the doors but not the transponder only the dealers can do that.
Hope this helps you mate
You can programme the electric part yourself to open the doors but not the transponder only the dealers can do that.
Hope this helps you mate
dont you need the SKC code for the immobaliser and you can get that on vag com?
LEE69 love your sig, im in support of this too!!!! its so annoying!!!
LEE69 love your sig, im in support of this too!!!! its so annoying!!!
Yeah but there is ways of getting it with vag tacho and vw tool ( i think) vag com is used when you have the code.
Early cars came with the code ofrom the dealer on a scratch of bit on the key ring.
Yeah sig is appropriate of late
Early cars came with the code ofrom the dealer on a scratch of bit on the key ring.
Yeah sig is appropriate of late
Similar threads
