You have two oxygen sensors in Toyota Rav4, One before the catalytic converter and another after.
2
There are two of them.
none
Only one.
4
4
4 all together
3 sensors are on toyota altezza AT rs 200
The 2002 Toyota Camry XLE has four oxygen sensors. There are two sensors on the exhaust manifold ,and one before and one after the catalytic converter.
There are two(2) oxygen sensors on a GT-S. One sensor pre-cat and on post-cat
A Toyota 5vz-fe engine has two oxygen sensors. There is a higher and lower sensor which send air and fuel readings to the ECU so the engine can run properly.