THIS ONLY WORKS WITH THE KEYS FROM THE SAME CAR AS THE PART YOU ARE REPLACING HAS THE IMMOBILISER please DO NOT click here :) --- / @noexpert how to #fix/upgrade your #audi #keyfob
But the car didn't start because you didn't change the transponder wish is located in the top part. Behind the logo is a screw to take it apart. Getting out the transponder is not easy and be carefull because you can break it. But I asume you allready found out.