July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

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
1. 15-25 N.m {1.6-2.5 kgf.m, 12-18 ft.lbf}
Fig 1: Identifying Knock Sensor And Bolt
Courtesy of MAZDA MOTORS CORP.