Genuine OEM Audi Yaw Rate Speed Sensor, part number 012409191D. This sensor is a crucial component of the vehicle's electronic stability control system, responsible for accurately measuring the vehicle's rotational speed around its vertical axis and its direction. The data it provides is vital for the system to detect and correct skids. Weighing 0.028 kg, this genuine OEM sensor ensures precise calibration and signal characteristics, which are essential for the reliable operation of safety-critical stability control systems.