they are on your exhaust manifold, just before the silencer
Toyota RAV4's have two (2) O2 sensors.
2
There are 2.
2
On exhaust pipes before and after cat. converters.
between the exhaust manifold and catalitic converter
All O2 sensors are threaded into the exhaust system at various points. Upstream O2 sensors are located before the catalytic converter(s) and downstream O2 sensors are located after the catalytic converter(s).
There are four o2 sensors on a montero sport.
There are 3 oxygen sensors on this vehicle. Some of the Highlanders with California emissions have 2 fron Air/Fuel Ratio sensors and one rear Oxygen sensor.
The 2.5 has 2 O2 sensors (both on top of the engine) and the 3.5 has 4 O2 sensors (two on top, and two under the car).
The o2 sensors screw in. There is a special socket for removing the 02 sensors with a slot in the side to clear the wiring.
All the O2 sensors are threaded into the exhaust system at various points.