Repair procedures: Removal

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
Disconnect the knock sensor connector (A).
[Knock Sensor (Bank 1)]

Fig 1: Disconnecting Knock Sensor Connector (Bank 1)
Courtesy of KIA MOTORS AMERICA, INC.

[Knock Sensor (Bank 2)]

Fig 2: Disconnecting Knock Sensor Connector (Bank 2)
Courtesy of KIA MOTORS AMERICA, INC.
Remove the intake manifold.
(Refer to Engine Mechanical System - "INTAKE MANIFOLD ")
Remove the mounting bolt (A), and then remove the sensor from the cylinder block.
Knock sensor mounting bolt :

15.7 - 23.5 N.m (1.6 - 2.4 kgf.m, 11.6 - 17.4 lb.ft)

[Knock Sensor (Bank 1)]

Fig 3: Removing Knock Sensor Mounting Bolt (Bank 1)
Courtesy of KIA MOTORS AMERICA, INC.

[Knock Sensor (Bank 2)]

Fig 4: Removing Knock Sensor Mounting Bolt (Bank 2)

Courtesy of KIA MOTORS AMERICA, INC.