Engine Coolant Temperature (ECT) Sensor Removal/Installation

Special Service Tool (SST)

Mazda SST number Global SST number
49 D015 001 - Box wrench	Courtesy of MAZDA MOTORS CORP.

WARNING:

A hot engine can cause severe burns. Turn off the engine and wait until it is cool before removing the ECT sensor.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
Remove the following parts:
1. Plug hole plate (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
2. Battery (See BATTERY REMOVAL/INSTALLATION .)
3. Air inlet pipe (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
Disconnect the ECT sensor No. 1 connector.
Remove the ECT sensor No. 1 using the SST.

Fig 1: Engine Coolant Temperature Sensor No. 1 Bolt With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)