[Knock Sensor #1 (Bank 1)]

Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Disconnect the knock sensor connector (A).

Fig 1: Identifying Knock Sensor Connector
Courtesy of HYUNDAI MOTOR AMERICA
Remove the intake manifold.
(Refer to "INTAKE MANIFOLD ")
Remove the installation bolt (A), and then remove the sensor from the cylinder block.

Fig 2: Identifying Cylinder Block Sensor Mounting Bolt
Courtesy of HYUNDAI MOTOR AMERICA