Knock Sensor (KS) Removal/Installation [MZI-3.7]

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Put a tray under the converter housing to receive the engine coolant.

Disconnect the negative battery cable.
Remove the following part for easier access.
1. Complete the "BEFORE SERVICE PRECAUTION". See BEFORE SERVICE PRECAUTION [MZI-3.7] .
2. Remove the engine cover. See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7] .
3. Remove the ventilation hose. See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZI-3.7] .
4. Remove the TP sensor connector. See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7] .
5. Remove the vacuum hose (to purge solenoid valve). See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZI-3.7] .
6. Remove the vacuum hose (to master back). See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7] .
7. Remove the dynamic chamber. See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7] .
8. Remove the fuel hose. See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [MZI-3.7] .
9. Remove the fuel distributor. See FUEL INJECTOR REMOVAL/INSTALLATION [MZI-3.7] .
10. Remove the intake manifold. See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7] .
  
  Fig 1: Identifying Tray
  Courtesy of MAZDA MOTORS CORP.
Remove in the order indicated in the table.

Fig 2: Identifying Knock Sensor Removal/Installation Order
Courtesy of MAZDA MOTORS CORP.
NOTE:
- Lubricate the new 0-ring with clean engine coolant for installation
Install in the reverse order of removal.
Complete the "AFTER SERVICE PRECAUTION". See AFTER SERVICE PRECAUTION [MZI-3.7] .