Repair Procedures: Removal

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Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
Remove the cable from alternator "B" terminal (A).

Fig 1: Alternator Terminal
Courtesy of KIA MOTORS AMERICA, INC.
Remove the knock sensor bracket (A).
Loosen the mounting bolt (B) and disconnect the connector (C).
Remove the sensor from the cylinder block.

Fig 2: Knock Sensor Connector, Bracket & Mounting Bolts
Courtesy of KIA MOTORS AMERICA, INC.