o2 sensor Bank 1/ Bank 2

I need to know where bank 2, sensor 2 is. I know that sensor 2 is post cat but i've read many different responses as to which side is bank 2. Some people say it's passenger side, some say it's drivers side.
Does anyone know for sure?

Also, has anyone replaced an o2 sensor, if so, what brand (item #) did you use?

Bank 2 is drivers side