Where is the water pump on a1999 Audi A4 1.8 t?

On a 1999 Audi A4 1.8T, the water pump is located at the front of the engine, driven by the timing belt. To access it, you'll typically need to remove the timing belt cover and possibly other components like the crankshaft pulley. It's advisable to refer to a repair manual for specific instructions, as replacing the water pump usually involves significant disassembly.