The Genuine BMW Sound Insulation Engine Compartm. Left - 51489119889 is a high-quality sound insulation component designed specifically for BMW vehicles. It is made from durable materials and is designed to fit perfectly into the left side of the engine compartment. This sound insulation helps to reduce engine noise and vibrations, providing a quieter and more comfortable driving experience. It is an essential component for maintaining the overall performance and comfort of your BMW vehicle.