The Genuine BMW Mechanical Fuel Pump (part number 13518643464) is a high-quality fuel pump designed specifically for BMW vehicles. It is a mechanical pump that uses a series of gears and a diaphragm to draw fuel from the gas tank and deliver it to the engine. This fuel pump is essential for ensuring proper fuel flow and pressure to the engine, which is crucial for optimal performance and fuel efficiency. It is a genuine OEM (original equipment manufacturer) part, meaning it is made by the same company that produced the original part for your BMW vehicle. This ensures a perfect fit and reliable operation. The Genuine BMW Mechanical Fuel Pump is a durable and reliable choice for maintaining the performance of your BMW's fuel system.