Whats the speed sensor on the front passenger side knuckle assembly for. on 2004 Hyundai Elantra

There is no abs on this vehicle

2 answers
poss speed sensor accoding to my info.more details please.
SPEED SENSOR AKA : ABS SENSOR LOCATED BACK OF THE FRONT HUB ASSY.
YOU WILL SEE ELECTRICAL WIRE GOING TO IT