Engine Coolant Temperature Sensor Removal/Installation

Disconnect negative battery cable.
Partially drain the cooling system. See ENGINE COOLANT REPLACEMENT - 3.0L or ENGINE COOLANT REPLACEMENT - 4.0L .
Disconnect engine coolant temperature (ECT) sensor connector.
NOTE:
- The 2.3L engine has a CHT sensor. See CYLINDER HEAD TEMPERATURE (CHT) SENSOR REMOVAL/INSTALLATION - 2.3L .
Remove the ECT sensor.

Fig 1: Removing ECT Sensor
Courtesy of MAZDA MOTORS CORP.
Install in reverse order of removal.
Tightening torque

16-24 N.m { 1.6-2.4 kgf.m, 12-17 ft.lbf }