The Genuine VW / Audi Timing Chain Kit - 178669 is a comprehensive set of products designed to replace the timing chain in a car. It includes a variety of components such as gears, tensioners, guides, and other necessary parts to ensure proper functioning of the timing chain system. The kit is specifically designed for use in Volkswagen and Audi vehicles, but can potentially be used in other makes and models as well. It is a high-quality, genuine product that is manufactured to the exact specifications of the original parts, ensuring a perfect fit and reliable performance. This kit is essential for maintaining the proper timing of the engine, which is crucial for optimal engine performance and longevity. By replacing the timing chain with this kit, car owners can avoid potential engine damage and costly repairs in the future.