Knock Sensor: Removal

Disconnect the ground cable from the battery.

Fig 1: Connecting Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.
Remove the air intake chamber. <Ref. to EXTXREF IN(H4SO)-6, REMOVAL, Air Intake Chamber .>
Disconnect the knock sensor connector.

Fig 2: Identifying Knock Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Remove the knock sensor from cylinder block.

Fig 3: Identifying Knock Sensor

Courtesy of SUBARU OF AMERICA, INC.