I know several people, including myself have been having engine codes such as P0135 for 02 sensors. I wrote to www.oxygensensors.com in hopes of finding a cheaper alternative to the Nissan OEM price of around $120 and one that has an OEM harness (not any of the Autozone choices which require splicing of wires because there is no direct-fit harness). I received this response...

The only direct-fit unit that I have is the Walker 250-23133 for $89.90. If you would like to get in on the maxima.org deal, orders by phone are discounted 10% ($80.91) or you can mail a money order for 15% ($76.41) off. Free Priority Mail shipping is still included.

He also included this diagram which I think will help some of us in finding exactly what 02 sensor we need and where it is...



I'm going to be sending a money order and saving around $40 over Nissan prices. Hope this is helpful to some people.

 

Good info... and just to add to that, you can find that same diagram and more here:

http://maxima.theowensfamily.com/tsb/NTB02-051a.pdf

 

yes, and also i can probably get any diagrams/pics from the svc manual if anyone needs them.

 

If ya mean the FSMs, I have em from 2000-2003 and still think the TSB diagrams are more straightforward and easier to use. But that's just me.

 

i have it for any year/make/model

personally, i prefer hacing the car on a lift in front of me