The Genuine VW / Audi Fuel Pump Kit - 178337 is a comprehensive set of products designed to service the fuel pump of a Volkswagen or Audi car. It includes three essential components: a fuel pump, a fuel filter, and a fuel strainer. These parts work together to ensure proper fuel delivery to the engine, maintaining the car's performance and efficiency. The fuel pump is responsible for drawing fuel from the tank and delivering it to the engine, while the fuel filter removes any impurities or debris from the fuel. The fuel strainer is a small mesh filter that further removes any particles from the fuel before it reaches the engine. Together, these products provide a complete solution for maintaining the fuel system of a VW or Audi car.