Air Fuel Ratio Sensor/Oxygen Sensor

[stuff4096]

I have a 2000 Toyota Camry CE 5SFE engine, automatic transmission. In looking up the parts list for my vehicle I noticed the following:

89467‑33020: Air Fuel Ratio Sensor
89465‑06010: Oxygen Sensor, Front
89465‑06040: Oxygen Sensor, Rear

Of the three, I think the location of the rear oxygen sensor is most obvious. When I look underneath my car, it is around the middle, connected to the exhaust pipes

My question is about the location of the air fuel ratio sensor and the front oxygen sensor. I believe the air fuel ratio sensor is located near the radiator at the front of the car under the hood, protected by a heat shield. I have no idea where the front oxygen sensor could be located. When I looked under my car, I did not notice anything obvious

I would appreciate it if someone could either describe or point me to a picture of the location of the air fuel ratio sensor and the front oxygen sensor

[fenixus]

Air Fuel Ratio sensor (for California emission spec'ed cars) = Upstream/front oxygen sensor (on federal emission spec'ed cars).

which one is yours? there is a sticker under hood, if it mentions California emissions compliance then go with AFR sensor, if it doesn't then go with O2 sensor for upstream (right where you noticed it is).

[stuff4096]

Originally Posted by fenixus

Air Fuel Ratio sensor (for California emission spec'ed cars) = Upstream/front oxygen sensor (on federal emission spec'ed cars).

which one is yours? there is a sticker under hood, if it mentions California emissions compliance then go with AFR sensor, if it doesn't then go with O2 sensor for upstream (right where you noticed it is).

Thanks for the response fenixus! I looked under the hood and indeed it mentioned California emissions compliance as you said. As expected, the O2 sensor I bought does not match the connector for the air fuel ratio sensor that is currently in my car so I need to return it for the correct part