How to Reprogram an Audi Key

1. Gather both of your keys, including the one you do not need to program. Shut all of the doors in your vehicle. You must have both the master and the secondary key to program one.
2. Insert the key you do not want to program into the ignition and turn it to the 'On' position, without cranking the engine.
3. Roll down your driver's side window and insert the key you wish to program into the door lock. Press the 'Unlock' button on the key (the one in the door lock) and wait for the lights to flash. Press the 'Unlock' button again, then press the 'Lock' button. Remove both keys and test.