Knock Sensor #1 (Bank 1)

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

Fig 1: Locating Knock Sensor Connector
Courtesy of KIA MOTORS AMERICA, INC.
Remove the intake manifold.
(Refer to Engine Mechanical System - "INTAKE MANIFOLD ")
Remove the installation bolt (A), and then remove the sensor from the cylinder block.

Fig 2: Locating Knock Sensor Connector Installation Bolt

Courtesy of KIA MOTORS AMERICA, INC.