Where do I find the downstream O2 sensor

Question

I see one sensor right in the catalytic converter.
I want to be surw I don't replace the upstream sensor by accident.

Answer 1

The upstream 02 sensor are engine monitor sensor, The Downstream are the catalytic monitor sensor, which is after the catalytic convertor. In Subaru the front 02 sensor between the two exhaust pipe is the upstream 02 sensor. The Downstream is on the top of the catalytic convertor where the exhaust that pass thru the catalytic is going thru

Comments

Reynaldo,
Thank you for answering both of my questions very accurately.
I see that you receive points for your help.  If it were up to me, you would get 90,000 for the ease you provided me in solving my issues.