Turn ignition switch OFF and disconnect the battery negative (-) terminal.
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.
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
Installation is reverse of removal.
Knock sensor installation bolt:
18.6 - 23.5 N.m (1.9 - 2.4 kgf.m, 13.7 - 17.4 lb-ft)