1 located on the manifold before the cata converter. If your replacing it DO not get bosch universal cause it sucks will only last you 1-3 months than trash.
on the header
My 1995 Ford Explorer with 4.0 L OHV has 2 oxygen sensors (Helpfull)
how many oxgen sensors on a 1995 millenia
two
no xoygen sensors on diesels
One
two
All O2 sensors are threaded into the exhaust system at various points.
any car after 1995 has two, or four oxygen sensors,as they use OBDII system
On a 1995 Ford Explorer : There are ( 2 ) oxygen sensors ( I believe there is one sensor in the outlet of each exhaust manifold )
The only oxygen sensor is screwed into the front of the catalytic converter.
2