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Knock Sensor (KS) Removal/Installation

Disconnect the KS connector.
Remove the KS installation bolt and remove the KS.
Install in the reverse order of removal.
KS tightening torque 15-25 N.m {1.6-2.5 kgf.m, 12-18 ft.lbf}

Fig 1: Identifying Installation Bolt & KS Connector Terminal
Courtesy of MAZDA MOTORS CORP.