Is your 2004 Audi A4 key fob not working reliably? A common culprit is a dead battery. Replacing the battery in your key fob is a straightforward process that can often be done at home, saving you a trip to the dealership.
Typically, 2004 Audi A4 key fobs use a CR2032 battery. You can find these batteries at most drugstores, supermarkets, and online retailers. Once you have your new battery, here’s how to get your key fob working again.
Sometimes, after replacing the battery, your key fob might need to be resynchronized with your Audi A4. Here’s a simple two-step synchronization procedure you can try:
- Press either the LOCK or UNLOCK button on your key fob just one time.
- Within 60 seconds of pressing the button, use the physical key to manually lock or unlock your driver’s side door.
After this process, your key fob should be working correctly again. This procedure is often effective when the key fob loses synchronization, which can happen if buttons are pressed repeatedly while out of range of the vehicle.
If the standard resynchronization doesn’t work, there’s another reported method you might attempt. Some users have found success by manually using the key in the driver’s side door. Try this: insert the key into the driver’s side door lock, turn it as if you are unlocking the car, and then press the lock or unlock buttons on the key fob. The exact order of button presses might vary, but attempting both lock and unlock while manipulating the door lock could re-establish the connection.
Replacing your 2004 Audi A4 key fob battery and resynchronizing it can often resolve most common key fob issues. By following these simple steps, you can likely get your remote working again quickly and efficiently.
