The Genuine VW / Audi Fuel Pump Kit - 178355 is a comprehensive kit of products designed specifically for use in a car's fuel system. It includes four essential components that work together to ensure the proper functioning of the fuel pump, which is responsible for delivering fuel from the tank to the engine.

The first component included in the kit is a fuel pump itself, which is a mechanical or electrical device that creates the necessary pressure to move fuel through the system. The second component is a fuel filter, which helps to remove any impurities or debris from the fuel before it reaches the engine. This helps to prevent damage to the fuel pump and other engine components.

The third component of the kit is a fuel pressure regulator, which helps to maintain a consistent level of pressure in the fuel system. This is important for ensuring that the engine receives the correct amount of fuel for optimal performance. Lastly, the kit includes a fuel pump relay, which is an electrical component that controls the operation of the fuel pump.

Together, these four components make up the Genuine VW / Audi Fuel Pump Kit - 178355, providing all the necessary parts for a complete fuel pump replacement or repair. This kit is designed specifically for use in VW and Audi vehicles, ensuring compatibility and high-quality performance.