Genuine OEM Volkswagen In-Tank Fuel Pump Assembly, part number 3C8919051A. This essential component is responsible for drawing fuel from the vehicle's fuel tank and delivering it under pressure to the engine's fuel system. It is typically located inside the fuel tank, often integrated with the fuel level sending unit. The assembly weighs approximately 2 kg and is constructed from durable plastics and metal components designed for fuel immersion. Using a genuine OEM fuel pump ensures precise fuel pressure regulation, correct flow rates, and long-term resistance to fuel contaminants, which are crucial for engine efficiency and longevity.