It depends on the model of mistubishi.
4
There are two.
It has 4 and they are in the exhaust system.
4 sensors, 2 are pre-catalytic convert and 2 are post-catalytic converter
It has 4 and there all screwed into the exhaust system.
4 and there all screwed into the exhaust system/pipes.
Four, two before the cats (upstream) and two after the cats (downstream).
The o2 sensors on the 2002 Pontiac Grand Am GT are found screwed into the exhaust pipe. There are 2 of these on the 2002 Grand Am GT.
There are multiple O2 sensors on a 2002 Chevy truck. They are all located on the exhaust system. There will be pre catalytic converter and post catalytic converter sensors.
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.
There are two 02 sensors in a 2002 Town and Country. One is in the exhaust manifold, the other is in the tail pipe just behind the catalytic converter.
two