Need help repalceing B1 S1 on 2004 Nissan armada. This is sensor that nissan told me needed to be replaced. I was justed wonder where bank 1 is located and where senosr 1 is located


thanks

Welcome to CA hedtrnr!

I am not sure at all, but hopefully one of the members who know will respond. In the mean time, the links below will get you all of the service manuals.
http://x.nissanhelp.com/forums/Knowledgebase.html?catid=135

...and http://www.nicoclub.com/FSM/armada/

Question answered in other thread.
There is no need to double post, it can lead to problems.