Repair Procedures: Removal

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 ~ 8.0 lb-ft)

Fig 1: Remove Rear Wheel Speed Sensor Mounting Bolt
Courtesy of KIA MOTORS AMERICA, INC.
Remove the rear wheel speed sensor cable mounting bolt.
Remove the rear wheel house trim.
(Refer to Body - "REAR WHEEL HOUSE TRIM ")
Disconnect the rear wheel speed sensor connector and than remove the rear wheel speed sensor.
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.