[shipoopi]

After letting my kids drive my car (2005 A4 Avant) while I was out of the country, I am now short one remote. Apart from the obvious answer (which is get them to pay for a new remote from the main Audi dealer) I'm looking for some advice on setting up a replacement. I have one working remote plus the valet key.

I've just bought a second-hand remote off ebay which I've synchronized and it's operating the central locking OK. While I suppose I could just leave the valet key on the same keyring as the remote, I'd like to get a new blade cut and transfer the immobilizer RFID from the valet key to the new remote. The problem is I can't find where the chip sits in the remote. I had a look at some of the forums but the remotes seem to be different - unless I've missed something.

Below is a photo of the bits. It looks like the RFID chip might be under the grey plastic bit (where the scewdriver is pointing) but it seems to be bonded in some way. I'm reluctant to try a larger screwdriver and more brute force without pausing for advice.

 

[chittychittybangbang]

Yep, the location of the chip in the VW keys is also right next to the switchblade. It also sits in some glue so scratching the edges with a pick to loosen it up will help prevent damage. I am not sure if leaving the valet key on the same keyring will work because then there will be 2 chip signals.

Good luck!

 

[shipoopi]

You were correct Chitty it was glued at the upper and lower edges. Removing the sprung battery contacts allowed easier access with a pick and modelling knife.

This allowed the plastic cover with the redundant immobilizer RFID chip to be removed,

All that was left to do was remove the required RFID chip from the valet key.

The chip is really easy to remove if you don't mind breaking it so if you want to remove it in one piece then best go easy.

I removed most of the plastic with a gas-powered soldering blade and the remainder with a modelling knife. If you're using heat on this be sure to work in a well ventilated area. Not sure what type of plastic Audi use for the valet key but the fumes that it gave off when heated were as nasty as anything I smelt in 30yrs in the fire service.:eek

 

[chittychittybangbang]

Many thanks for the detailed pics! The newer Touareg key looks like that as well. The big question is, does it work

 

[shipoopi]

Yes works fine thanks.

Ordered a new switchblade off ebay which arrived today. Emailed a photo of the original blade and they cut it from that. Was very sceptical but it works a treat.

Tried to tell my kids about all my hard work in cobbling together a replacement key fob for the one I reckon they lost but the ingrates just didn't seem to get it - frankly I blame their mother:dunno