The Genuine VW / Audi Drive Belt Kit - 178158 is a comprehensive set of products designed for use in a car's drive belt system. The kit includes various components such as a drive belt, tensioner, and idler pulley, all of which play a crucial role in powering the vehicle's engine and other systems. Additionally, the kit may also include other necessary hardware such as bolts and washers for installation. These products are specifically designed to fit and function seamlessly in VW and Audi vehicles, ensuring optimal performance and reliability. The kit is a convenient and cost-effective solution for maintaining the drive belt system of a car and ensuring it runs smoothly.