For 1990-2009 cars

### Removal Procedure

1. Loosen the radiator drain plug and drain the coolant 1 liter below the level of the coolant in the coolant surge tank, using a drain pan.
2. Tighten the drain plug.
3. Disconnect the engine coolant temperature (ECT) sensor harness connector.
4. Remove the ECT sensor.

### Installation Procedure

1. Apply RTV sealant, or equivalent, to the sensor threads.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the ECT sensor.

Tighten
Tighten the engine coolant temperature sensor to 18 N·m (13 lb ft).

3. Connect the ECT sensor harness connector. Push the connector in until the lock position is felt, then pull back to confirm engagement.
4. Refill the cooling system to the proper level. Refer to Coolant Replacement.