The Genuine VW / Audi Ignition Coil Kit - 178389 is a comprehensive set of products designed specifically for use in a car's ignition system. This kit includes various types of ignition coils, which are essential components in the process of starting a car's engine. These coils are responsible for generating the high voltage needed to ignite the fuel and air mixture in the engine's cylinders. The kit also includes other necessary components such as spark plugs, wires, and connectors, which work together with the ignition coils to ensure smooth and efficient engine performance. This kit is designed to fit VW and Audi cars, providing a reliable and high-quality solution for ignition system maintenance and repair.