The Genuine BMW Adaptive Headlight Control Unit - 63117316217 is a component of the BMW Adaptive Headlight System. This unit is responsible for controlling the movement and direction of the headlights based on the vehicle's speed, steering angle, and other factors. It uses sensors and actuators to adjust the headlights in real-time, providing optimal visibility and safety while driving. This control unit is an essential part of the BMW Adaptive Headlight System and is designed to meet the highest quality and performance standards of the BMW brand.