Disconnect the negative battery terminal
Let the engine cool completely
Locate the coolant temperature sensor
Place a drain pan under the sensor area
Drain enough coolant to lower the level below the sensor
Unplug the sensor electrical connector
Remove the sensor retaining clip or unscrew the sensor
Remove the old sensor
Install the new sensor with a new seal or O-ring if required
Tighten the sensor to the specified torque
Reconnect the electrical connector
Refill the cooling system with the correct coolant
Reinstall the radiator cap or reservoir cap
Reconnect the negative battery terminal
Start the engine and check for leaks
Verify proper engine temperature and warning light operation
Top off coolant as needed after the engine cools again