This Arnott ride height sensor, part code RH-4387, is designed to accurately measure the distance between the chassis and the suspension components. It plays a crucial role in the automatic leveling system of vehicles equipped with air or hydraulic suspension. By providing real-time data to the control module, it ensures the vehicle maintains the correct ride height under varying load conditions, contributing to a stable and comfortable ride, as well as proper headlight aiming. Ensure proper fitment for your specific vehicle model.