Once you want to replace the Steering Angle Sensor, you must first disable the sir system and remove the Steering Column from the vehicle. Then, remove the steering shaft seal and the retainer for the sensor. If the sensor is meant to be reused, it must possibly be centered before removal. Make way to get the sensor assembly out along with the lower spring retainer and the adapter and bearing assembly. For installation, connect the adapter and bearing assembly to the steering shaft assembly and then install the lower spring retainer onto it. Centre the sensor assembly prior to installing it and rotate steering shaft assembly to 12 o'clock before installing it. Mount the sensor assembly to the steering shaft assembly, followed by the sensor retainer and seal. Last but not least, plug in the Steering Column back to its spot in the vehicle and turn on the sir system back on.