The Genuine VW / Audi Drive Belt Kit - 178164 is a comprehensive set of products designed for servicing the drive belt system of a car. This kit includes three essential components: a drive belt, a tensioner, and an idler pulley. These parts work together to ensure proper functioning of the drive belt, which is responsible for transferring power from the engine to various components of the vehicle such as the alternator, power steering pump, and air conditioning compressor. The drive belt is a crucial part of a car's engine system and regular maintenance and replacement is necessary to avoid potential breakdowns and damage. This kit is specifically designed for use in Volkswagen and Audi vehicles, ensuring a perfect fit and high-quality performance.