I needa diy rear o2 sensor pleaseeeee
 

I can't find it through search only the front I found. I was under my car today but I couldn't find it nor could I find pictures... Help please

You found it.

You (almost) can't see the front one, it's on top of the header.
The rear hangs down low on the side of the big catpipe.
It is downstream of the three-bolt header to catpipe joint, and upstream of the two-spring-bolt muffler joint.


S