ECT Sensor No. 2

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
Disconnect the ECT sensor No. 2 connector.

Fig 1: Detaching ECT Sensor No. 2 Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the hoses. (See HOSE CONNECTION NOTE .)

Fig 2: Detaching Hoses
Courtesy of MAZDA MOTORS CORP.
Remove the nut from the water pipe.

Fig 3: Removing Nut From Water Pipe
Courtesy of MAZDA MOTORS CORP.
Move the water pipe in the direction of the arrow shown in the figure to remove it. (See WATER PIPE INSTALLATION NOTE .)

Fig 4: Locating Water Pipe
Courtesy of MAZDA MOTORS CORP.
Remove the ECT sensor No. 2 using the SST.

Fig 5: Removing ECT Sensor
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)