The Genuine BMW Washer-Gasket is a small rubber ring that is used to create a seal between two surfaces in a BMW vehicle. It is part number 51127131741 and is made by the original manufacturer, BMW. This washer-gasket is designed specifically for BMW vehicles and is an important component in ensuring proper functioning and preventing leaks in various systems. It is a genuine OEM (Original Equipment Manufacturer) part, meaning it is made to the same specifications as the original part installed in the vehicle. This washer-gasket is essential for maintaining the high quality and performance of a BMW vehicle.