ECT Sensor No. 2

WARNING: This page is about a different car, the 2025 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [VIN L (WITHOUT CYLINDER DEACTIVATION)] .)
Remove the coolant control valve. (See COOLANT CONTROL VALVE REMOVAL/INSTALLATION [VIN L (WITHOUT CYLINDER DEACTIVATION)] .)
Remove the ECT sensor No. 2 using the SST.

Fig 1: ECT Sensor No. 2 With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT [VIN L (WITHOUT CYLINDER DEACTIVATION)] .)