Ultrasonic Sensor: Replacement

Disconnect the negative (-) battery terminal.
Remove the rear bumper (Refer to the "REAR BUMPER ")
Disconnect the sensor connector at the inside of the rear bumper, and then remove the sensor (B) from the housing (A).

Fig 1: Identifying Sensor And Housing
Courtesy of KIA MOTORS AMERICA, INC.
Installation is the reverse of removal procedure.