The Genuine VW / Audi Timing Belt Kit - 178632 is a comprehensive kit of products designed to service the timing belt of a Volkswagen or Audi car. The kit includes three essential components: a timing belt, a tensioner, and a water pump. These parts work together to ensure the proper functioning of the engine's timing system. The timing belt is responsible for synchronizing the rotation of the engine's camshaft and crankshaft, while the tensioner maintains the correct tension on the belt. The water pump helps to cool the engine and prevent overheating. This kit is specifically designed for use in Volkswagen and Audi cars, and is made with high-quality materials to ensure durability and performance. It is an essential kit for any car owner looking to properly maintain their vehicle's timing system.