Knock Sensor (KS) Removal/Installation: Notes

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
Remove the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
Remove the bolts.

Fig 1: Intake Manifold Stay Bolts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the intake manifold stay.
Disconnect the KS connector.
Remove the bolt.

Fig 2: Knock Sensor Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the KS. (See KS Installation Note .)
Install in the reverse order of removal.