One problem related to wiper has been reported for the 2003 Audi TT. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Audi TT based on all problems reported for the 2003 TT.
My 2003 Audi Tt quattro has an intermittent headlight, have tried numerous times replacing the bulb as well as switch. After looking at numerous posts, it is clear that this is a huge fault by the manufacturer of headlight failure. In my state you get a ticket for a single light out (NY) and this headlight fails intermittently either when at 0mph or 60mph. Huge safety concern especially if driving at night or in the rain, on top of the traffic violations.