The Genuine VW/Audi Timing Belt Kit - 178646 is a comprehensive set of products designed for servicing the timing belt of a Volkswagen or Audi vehicle. The kit includes six essential components, each carefully selected to ensure proper maintenance and optimal performance of the timing belt. These components include a timing belt, tensioner, idler, water pump, gaskets, and seals. The timing belt is responsible for synchronizing the rotation of the engine's camshaft and crankshaft, and the tensioner and idler help to maintain the correct tension and alignment of the belt. The water pump is also an important component as it circulates coolant to prevent overheating of the engine. The gaskets and seals are used to create a tight seal to prevent leaks and ensure the longevity of the timing belt. This kit is specifically designed for Volkswagen and Audi vehicles, providing high-quality and reliable parts for efficient and effective timing belt maintenance.