4WD only

Remove the rear wheel and tire.
Tightening torque :

88.3 ~ 107.9 N.m (9.0 ~ 11.0 kgf.m, 65.1 ~ 79.6 lb-ft)
Remove the rear wheel speed sensor mounting bolt (A).
Tightening torque :

6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 7.6 lb-ft)

Fig 1: Locating Rear Wheel Speed Sensor Mounting Bolt
Courtesy of KIA MOTORS AMERICA, INC.
Remove the rear wheel guard.
Disconnect the rear wheel speed sensor connector (A).

Fig 2: Locating Rear Wheel Speed Sensor Connector With Bolts
Courtesy of KIA MOTORS AMERICA, INC.
Install in the reverse order of removal.

CAUTION: Install the rear sensor after lubricating the O-ring of sensor with the assembly fluid (RAREMAX AF-1).
When inserting the sensor, take care the O-ring not to be damaged.