The Genuine BMW Sound Insulating Wheel Housing Rear Left (part number 51488167677) is designed to reduce noise and vibrations from the rear wheel while driving. It is made from high-quality materials and is an exact fit for BMW vehicles. This product is specifically designed to fit the left side of the rear wheel housing and provides effective sound insulation for a more comfortable and quiet driving experience. It is an authentic BMW part and is recommended for replacement or repair of damaged or worn out wheel housing insulation.