The key fob worked to unlock the door, the problem was that the door latch assembly no longer activated the puddle lights, footwell lights, interior lights and door warning lights. That bugged me so I replaced the assembly.
Even though the car is 20 years old it is like new and everything works. It came with heated seats, heated steering wheel, warning sensors in the bumpers, level adjusting xenon headlights, sports seats and suspension, it had every option available in 2002. I since replaced the stereo head unit with a Kenwood with 7" screen, apple car play and backup camera and added remote start. It is pretty much as technically advanced as many new cars so I try to keep it in perfect condition. The new aftermarket actuator cost me $112.00 so I felt it was worth it. If I had to pay $450 for an Audi unit I wouldn't have done it.
One thing that now works with the new unit is the warning sound if you leave the headlights on, that did not work when I bought the car so I was unaware it existed. Now, if you leave the headlights on after turning off the engine and open the door a warning buzzer sounds. Over the years I have left the headlights on a few times.