ECT Sensor No. 2

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

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: Identifying ECT Sensor No. 2, Connector And Water Pipe
Courtesy of MAZDA MOTORS CORP.
Disconnect the hoses. (See HOSE CONNECTION NOTE .)

Fig 2: Identifying ECT Sensor No. 2, Hose And Water Pipe
Courtesy of MAZDA MOTORS CORP.
Remove the nut from the water pipe.

Fig 3: ECT Sensor No. 2, Water Pipe And Mounting Nut With Torque Specifications
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: Removing Water Pipe
Courtesy of MAZDA MOTORS CORP.
Remove the ECT sensor No. 2 using the SST .
Install in the reverse order of removal.
Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)

Fig 5: ECT Sensor No. 2 And SST With Torque Specifications
Courtesy of MAZDA MOTORS CORP.