Save over dealer prices on Audi VW temperature sensors. Consider replacing the temperature sender (a.k.a. sensor), which often controls the temperature gauge, ECU fuel mixture and radiator fan engagement.
Audi VW Water Temp Sender Kit - 1998-08 - Black or Green Sender
Fits 4,5,6 or 8 Cyl Engines - Note: 1999 owners must confirm that they have a green or black 4 pin oval connector sender (20mm OD end probe).