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.
Car Problem Reports
Audi TT Quattro Inspection of Water Pump and Timing Belt
Audi TT Quattro Problem
Engine Affected: 1.8L 4 Cylinder Turbo
Visitor, 2004 Audi TT Quattro, 1.8L 4 Cylinder Turbo, 66,000 mi
teeth on timing belt broke off ,all valves bent and pistons marked up!!!!