Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Drain the engine coolant.
(Refer to Engine Mechanical System - "Coolant")
Remove the radiator upper hose.
(Refer to Engine Mechanical System - "Intake Manifold")
Disconnect the knock sensor connector (A).
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.