The Genuine BMW Sound Insulation Trunk Left - 51487070521 is a high-quality sound insulation component designed specifically for BMW vehicles. It is made from durable materials and is designed to fit perfectly in the trunk of your BMW. This sound insulation helps to reduce outside noise and vibrations, creating a quieter and more comfortable driving experience. It is an authentic BMW product and is designed to meet the highest standards of quality and performance. This sound insulation is specifically designed for the left side of the trunk and is an essential component for a well-insulated and enjoyable driving experience.