The Genuine BMW Wiring Set for Left Seat Adjustment with Lordosis (part number 61118353948) is a wiring set designed specifically for BMW vehicles. It is used to connect the left seat adjustment function with the lordosis feature, which provides additional support for the lower back while driving. This wiring set is an authentic BMW product, ensuring high quality and compatibility with your vehicle. It is an essential component for maintaining the functionality of your BMW's seat adjustment system.