Knock Sensor (KS) Removal/Installation

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)] .)
Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))] .)
Remove the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))] .)
Disconnect the KS connector.
Remove the KS. (See KS INSTALLATION NOTE .)

Fig 1: Knock Sensor Bolt With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
KS Installation Note
- Verify that there is no foreign matter caught between the KS unit and cylinder block.
- The direction of the KS connector is within the angle range shown in the figure.
Courtesy of MAZDA MOTORS CORP.