99 Audi A4 reverse lights do not work on either side The bulbs are good and there are no blown fuses Brake lights and driving lights are fine What may be causing this?

On my 98 A4 1.8T I had the same problem. The problem was the entire headlight switch on the stearing column went bad. I dont know if the headlight switch has anything to do with the reverse lights but from my own experience the reverse light problem is caused by thhe reverse light switch which is in the gearbox. I got a price of