ECT Sensor No. 1

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
Pull out the evaporative hose No. 1 from the catch tank and set it aside.

Fig 1: Pulling Out Evaporative Hose No. 1 From Catch Tank
Courtesy of MAZDA MOTORS CORP.
Pull out the ventilation hose from the air hose and set it aside.

Fig 2: Pulling Out Ventilation Hose From Air Hose
Courtesy of MAZDA MOTORS CORP.
Remove the clip and loosen the wiring harness.

Fig 3: Loosening Wiring Harness
Courtesy of MAZDA MOTORS CORP.
Disconnect the ECT sensor No. 1 connector.
Remove the ECT sensor No. 1 using the SST .
Install in the reverse order of removal.
Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)

Fig 4: ECT Sensor No. 1 With Torque Specifications
Courtesy of MAZDA MOTORS CORP.