For 1990-2009 cars

### Removal Procedure

Note: Use care when handling the ECT sensor. Damage to the sensor will affect the proper operation of the fuel injection system.

1. Relieve the coolant system pressure and remove the coolant. Refer to Cooling System Draining and Filling

Warning: Refer to Battery Disconnect Warning in the Preface section.

2. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
3. Disconnect the engine coolant temperature (ECT) sensor connector (1).
4. Carefully remove the ECT sensor (2).

### Installation Procedure

Caution: Refer to Fastener Caution in the Preface section.

1. Install the ECT sensor (2) and tighten to 17.5 N·m (12.9 lb ft).
2. Connect the engine coolant temperature (ECT) sensor connector (1).
3. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
4. Fill the cooling system. Refer to Cooling System Draining and Filling.