How to fix non-working key fob on 2002 Audi A2?

I have a 2002 Audi A2 and my key fob stopped working. I can still unlock the car manually, but the remote functions do not work. How can I fix this issue?

First, try replacing the battery in your key fob. If that doesn't work, you may need to reprogram the fob. Instructions for this can typically be found in the car's manual or online. If all else fails, you may need to take the car to a mechanic or dealership for assistance.

Make sure the battery contacts in the key fob are clean and not corroded. If they are, try cleaning them with a small amount of rubbing alcohol. If that doesn't work, you may need to replace the fob itself.

It's possible that the key fob has simply reached the end of its lifespan and needs to be replaced. Check with a local dealership or auto parts store to see if they can provide a replacement.