07 2.5 o2 sensor question

[Joey666Crack]

So just my luck, I got finished changing my girlfriend's o2 sensor on her Firebird (PITA) and literally the next day I threw a code for bank 1 sensor 3 on my Altima (according to Advance Auto). I've searched around and haven't been able to find any information regarding the location of sensor 3 and my Google searches have brought up results that say fourth gens only have 2? I did briefly browse the FSM stickey but I didn't know which abbreviation to look under. Can anyone give me the location of bank 1 sensor 3 or at least point me in the direction of where to find it in the FSM?