It has 2. One in the exhaust manifold underneath the air filter box. and one just after the catalytic convertor.
Two, one before and one after the converterTwo, one before and one after the converter
Two, one before the cat, one after.
Two, One on the exhust manifold and the second after the CAT
There are two oxygen sensors in the exhaust behind the engine.
two
two
Two, one upstream (before cat) and one downstream (after cat).
four....two in each bank, one before the converter and one after the converter
I have a 1996 Firebird and it has 4. Two in the manifolds and one before the catalytic converter and one after.
There are two. One is before the catalytic converter and one after. You will find them screwed into the exhaust behind the engine.
There are two, one on each side of the catalytic converter.
two