For 1990-2009 cars

### Removal Procedure

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

1. Disconnect the negative battery cable.
2. Remove the heater core cover. Refer to Heater Core Replacement .
3. Disconnect the electrical connector.
4. Remove the sensor retaining screws.
5. Remove the sensor from the heater core pipe.

### Installation Procedure

1. Install the sensor with the retaining screws and tighten.
2. Connect the electrical connector.
3. Install the heater core cover. Refer to Heater Core Replacement .
4. Connect the negative battery cable.