The water pump may fail resulting in engine overheating and possible timing belt damage. Overheating and/or timing belt failure can result in very expensive engine repairs. As a precaution, it is recommended to inspect the timing belt and water pump at regular intervals.Google+
Car Problem Reports
Audi A6 Inspection of Water Pump and Timing Belt
Audi A6 Problem
Engine Affected: 2.8L V6
Average Mileage: 126,666 mi (75,000 mi - 160,000 mi)
Timing belt snapped, had to replace. Very costly. Had to also replace water pump while engine was torn apart. Entire front end of car has to be removed and dismantled. This problem is mostly a labor issue and very costly.
Visitor, 1995 Audi A6, 2.8L V6