Hi I have a 2004 Audi A3 and my key fob does not open or close the car. I am also unable to open the car manually with the key but i suppose thats a seperate issue as I havent attempted to open the car manually for a year or two. Fortunately, i can leave my window down so as to not get locked out. The car starts fine so the actual key part and the chip that deactivates the immobilser works fine. I have VAG COM software, does anyone know if I can re-program the key fob? The battery in the remote was dead for possibly 12 hours or so which has now been replaced so not sure if this has caused the need to re-sync with the car. If not, i suppose Audi will have to re-program it, for a small fortune. In addition, I only have one key.