The Genuine BMW Sound Insulat. Splash Wall Upper Part - 51717188420 is a sound insulation component designed for BMW vehicles. It is specifically designed to reduce noise and vibrations from the engine and road, providing a quieter and more comfortable driving experience. This product is made from high-quality materials and is an authentic BMW part, ensuring a perfect fit and optimal performance. The upper part of the splash wall helps to protect the engine compartment from water and debris, while also contributing to the overall sound insulation of the vehicle. It is a crucial component for maintaining the luxury and performance of a BMW vehicle.