The Genuine VW / Audi Ignition Coil Kit - 178390 is a comprehensive kit of products designed for use in a car. This kit includes all the necessary components to service the ignition coil system of a vehicle, specifically those made by Volkswagen or Audi. The contents of the kit include various types of ignition coils, which are essential for the proper functioning of a car's engine. These coils are responsible for creating the high voltage needed to ignite the fuel and air mixture in the engine's combustion chamber. The kit also includes other essential components such as spark plugs, wires, and connectors. These parts work together to ensure a smooth and efficient ignition process, resulting in optimal engine performance. This kit is a genuine product, meaning it is made by the original manufacturer and is of high quality. It is specifically designed for use in Volkswagen and Audi vehicles, making it a reliable and compatible choice for those looking to service their car's ignition system. Overall, the Genuine VW / Audi Ignition Coil Kit - 178390 is a convenient and reliable option for those in need of a comprehensive kit to service their car's ignition system.