ECT Sensor No. 1

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
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.
While pressing the clip tabs in the direction of the arrows (1) shown in the figure, push out the clip in the direction of the arrow (2) shown in the figure and remove the clip.

Fig 2: Pressing Clip Tabs
Courtesy of MAZDA MOTORS CORP.
Disconnect the ECT sensor No. 1 connector.
Remove the ECT sensor No. 1 using the SST.

Fig 3: Removing ECT Sensor No. 1 Using SST
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)