Removal & Installation (All Models)
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2003 Toyota Tacoma, 2003 Toyota RAV4, 2003 Toyota Prius, 2003 Toyota Matrix, and 2003 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .
- Servicing of heated oxygen sensor is just primarily an unbolt and bolt-on procedure. For heated oxygen sensor location, see HEATED OXYGEN SENSOR LOCATION table. It may be necessary to remove heat insulator for access to heated oxygen sensor. On MR2, it may be necessary to remove air cleaner assembly for access to heated oxygen sensor on exhaust pipe assembly.
- On all models, disconnect electrical connector for heated oxygen sensor.
- Remove retaining nuts or unscrew heated oxygen sensor.
- Remove heated oxygen sensor and gasket (if equipped).
- To install, reverse removal procedure using NEW gasket (if equipped). Tighten heated oxygen sensor or retaining nuts to specification (if available). See TORQUE SPECIFICATIONS .
HEATED OXYGEN SENSOR LOCATION
| Model | Location |
|---|---|
| Camry | On Exhaust Pipe Above Catalytic Converter |
| Camry Solara | On Exhaust Pipe Above Catalytic Converter |
| Celica | One On Exhaust Pipe In Front Of Catalytic Converter & One On Exhaust Pipe After Catalytic Converter |
| Corolla | One On Exhaust Manifold, Above Catalytic Converter & One On Exhaust Pipe After Catalytic Converter |
| ECHO | One On Exhaust Pipe In Front Of Catalytic Converter & One On Exhaust Pipe After Catalytic Converter |
| Highlander | Two Oxygen Sensors Are Mounted On Exhaust Manifold Below Catalytic Converters |
| Matrix | One On Exhaust Pipe Above Catalytic Converter & One On Exhaust Pipe After Catalytic Converter |
| MR2 | Two Oxygen Sensors Are Mounted On Exhaust Manifold Above Catalytic Converters & One On Exhaust Pipe Behind Catalytic Converter |
| Prius | One On Exhaust Pipe In Front Of Catalytic Converter & One On Exhaust Pipe After Catalytic Converter |
| RAV4 | Two Oxygen Sensors Are Mounted On Exhaust Manifold Below Catalytic Converters |
| Tacoma | On Exhaust Pipe After Catalytic Converter |