Repair Procedures: Removal

Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Remove the intake manifold. (Refer to "INTAKE & EXHAUST SYSTEM " in EM group)
Remove the knock sensor from the cylinder block.

Fig 1: Identifying Knock Sensor (Bank 1/Sensor 1) And Knock Sensor (Bank 1/Sensor 2)
Courtesy of HYUNDAI MOTOR CO.

Fig 2: Identifying Knock Sensor (Bank 2/Sensor 1) And Knock Sensor (Bank 2/Sensor 2)
Courtesy of HYUNDAI MOTOR CO.