Xantia key question

jgra1 · Unread post by **jgra1** » 08 Oct 2007, 11:43

Chaps, I am sure this has been before done to the death..

My new Xantia series 2 only came with the service key. If I aqquire an old key, and get a new blank cut and put into the fob, am I on the right lines?

The immobilser chip and the radio frequency will both need to be matched to my car? or will sorting the immobiliser signal alone cure both?

Thanks
John

AndersDK · Unread post by **AndersDK** » 09 Oct 2007, 01:59

Its - sort of - the other way round ...

Your in-car receiver is matched ("programmed") to the key handsender unit.
Therefore you need 2 exactly matching key handsender units, to avoid a "lockout" on the other key while one key is programmed - or vice-versa.
The mechanical key is no problem to make as many spares you like ...

Unread post by **RichardW** » 09 Oct 2007, 08:12

Not sure that's true with a MK11 Xantia....

There are 2 parts to the 'key' - one is the remote locking function (active, operated by the buttons) and the other is the immobiliser function (passive, activated by a chip embedded in the key somewhere). What I don't know is if the chip is in the key blade, or if it's in the fob part, and even if this can be coded in, or has to be factory coded to match the car. What I do know is that whilst you can have 2 remote keys coded to the car to unlock it, you cannot code these in without the use of the dealer's computer - and you need the four digit access code that should be on a card that came with the car - if this is missing (it almost certainly will be - mine is) then you will need to get this from Citroen too (more ££ no doubt!). I guess in theory you could buy a 2nd hand remote and get it coded into the car, but is the dealer likely to do this for you???? And will it disable the immobiliser.....

jgra1 · Unread post by **jgra1** » 09 Oct 2007, 09:19

thanks Rich, Anders..

sounds like an expensive experience. Immob chip is in fob, right where key exits. a tiny rectangle of different coloured plastic...

J

wheeler · Unread post by **wheeler** » 09 Oct 2007, 18:35

jgra1 wrote:thanks Rich, Anders..

sounds like an expensive experience. Immob chip is in fob, right where key exits. a tiny rectangle of different coloured plastic...

J

.
the transponder chip is in the keyblade part not the remote fob part.

Not 100% but i dont think you can reprogram a 2nd hand remote to a different car on the mk 2 & yes you do need a diagnostic machine to prog the keys & remotes on the mk2

jgra1 · Unread post by **jgra1** » 10 Oct 2007, 09:01

thanks Wheeler ....