Step 1: Disconnect the Negative Terminal of the Battery
Begin by disconnecting the negative terminal of your Audi A6's battery. This step will power off the electrical components of the car, including the immobilizer system.
Step 2: Reconnect the Negative Terminal
After a few minutes, reconnect the negative terminal of the battery. This will trigger a reset of the immobilizer system.
Step 3: Use the Master Key
Insert the master key (the original key that came with the car) into the ignition and turn it to the "On" position. This step will activate the immobilizer system and allow the spare key to be reprogrammed.
Step 4: Insert the Spare Key
Insert the spare key into the ignition and turn it to the "On" position. The immobilizer system will recognize the spare key and reset it to match the master key.
Step 5: Turn On the Engine
If the spare key is successfully reset, you should hear the engine start. If not, repeat steps 2 to 4 until the spare key is properly programmed.
Step 6: Replace the Negative Terminal Cover
Once the spare key is programmed, turn off the engine and replace the negative terminal cover of your Audi A6's battery.
By following these steps, you can reset a key that has been electronically immobilized because of using a spare key on an Audi A6.
