Can someone tell me the location for the O2 sensor on bank 1 sensor 1 on a Nissan Maxima 09?

 

Right on top of the manifold. Can't miss it.

 

Great, one more thing, autoparts webpage shows them as upstream front and upstream rear, but I dont know which is the right one for bank 1 sensor 1. Can you tell me?

 

Firewall.

 

That make it rear upstream... i guees?!

 

Depending on the month of production of your vehicle, you need one of the two part numbers below:

From 05/2008-08/2009
https://www.nissanpartsdeal.com/part...-module,,22693

From 08/2009-08/2011
https://www.nissanpartsdeal.com/part...-module,,22693

Shop around for a better deal, they're out there.

 

Great, i got the part, now I’m trying to take it out, is in the back of the engine by the firewall like you said. But no luck taking it off, is a small place and can’t work, and it’s really tight. Any tips or ideas?

 

I dunno man. I'd have to see it to figure it out. O2 sensors are usually pretty tight. Don't round it off or you're screwed.

 

I need some help, i got a 2009 maxima sv that was manufactured in 07/2008, I swapped the engine from a 2011 maxima and to my surprise none of the o2 sensors from either fit and I had no idea about this difference, what can I do to connect my o2 sensors?