How do you reset a VW key after replacing the battery?

Answer 1

Programming remote unit

- Switch ignition ON.

- Lock vehicle mechanically at left front door using second key.

- Press "Open" button on first remote unit (key fob) once (to assign memory address to remote unit number one).

Note: The alarm horn will sound briefly each time the "Open" button is pressed to confirm the reception of the signal during this process.

- Wait six seconds after sending last signal, then press "Open" button again.

^ Doors will now unlock (remote unit is now programmed).

- Lock vehicle mechanically again using second key.

- Press "Open" button on second remote unit (key fob) twice at 1 second intervals (to assign memory address to remote unit number two).

- Wait six seconds after sending last signal, then press unlock button again.

^ Doors will now unlock (2nd transmitter is now programmed).

- Repeat procedure for additional remote units (key fobs) to assign memory addresses number 3 and 4 if necessary.

- Switch ignition OFF. or

- Check each transmitter for proper function or Insert mechanically appropriate (old) ignition key into ignition lock.
‒ Switch on ignition.
‒ Switch ignition off within 5 seconds.
‒ Switch ignition on again within 5 seconds.
‒ Using the new key (being adapted), mechanically lock the vehicle within 15 seconds (i.e. driver-side door) or lock it via the internal locking switch and then operate the radio-frequency button on the key.
‒ After a pause of more than one second (but within 30 seconds), operate the radio-frequency button on the key a second time.
‒ The adaptation procedure has been completed and is confirmed when the vehicle blinks twice.