Audi A4 2004 Key Fob Resync

[Garroth]

Hi,

Years ago I replaced the key fob battery on a neighbours 2004 Audi A4 tdi and managed to successfully reprogram the key fob after I did it. I dont actually remember what we did but I could swear it involved pressing the unlock button multiple times while sitting in the car with the doors locked. Now Im trying to do it again years later and all the instructions for it tell you to turn the key in the ignition with the unlock button held down for 2 seconds, like this tutorial:

https://www.ebay.com/gds/How-to-Prog...8627435/g.html

Im 90% sure thats not how we did it though, it was something to do with being in the car with the doors locked, I dont have a second key to use either so cant go down that route.

Can anyone think of a different way of doing it with only one key? Thanks.

[The Brummie Mechanic]

I do vaguely remember doing it this way with just one key.

Ign lights on engine off, press and hold the unlock button for approx 5 seconds, let go of button and remove the key, press and hold lock button on remote for a few seconds and then all should work. 

 

If not you are going to need a 2nd key to get it working.