Where is bank 2 sensor on qx4?

On a Nissan QX4, the Bank 2 sensor, which refers to the oxygen sensor, is typically located on the side of the engine that does not contain the cylinder number one. For a V6 engine, this means Bank 2 is on the passenger side. The sensor can usually be found before or after the catalytic converter, depending on whether you are looking for the upstream or downstream sensor.