an electric motor for applying {HEAD ~ an electric steering assist} to a steering system of {TAIL ~ the vehicle} 
an electric motor for applying { HEAD ~ an electric steering assist } to a steering system of { TAIL ~ the vehicle }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL