Oxygen sensors are screwed into the exhaust on both sides of the catalytic converter.
Yes.
Two.
oneone
A 2002 Chrysler Town and Country has two oxygen sensors.
Yes, you unplug and unscrew them.
They are screwed into the exhaust on the rear of the engine.
4
Four. Two forward of the cat converter and two aft.
the upstream O2 sensors, are located on the top of the exhaust manifolds. they are sitting right there in the open where you can see them.
3
All O2 sensors are screwed into the exhaust system. Start at the exhaust manifold and work your way back toward the rear of the car and you will find all the O2 sensors.