The Nissan Path

Hello just changed the engine on my 2009 pathfinder. But I think I might have to change the sensors. Actually I am pretty sure I have to change them.

Could any of you give me a bit of guidance as to what to order?
I think the 2 front ones are O2 sensors and the rear are AF sensors - but really I have no clue... Help please.

Here's a good looking cheap downstream one but is this really it?
https://www.amazon.com/ECCPP-Downstream ... dpSrc=srch


you know here's all 4 of them for only $120...
https://www.amazon.com/Germban-Downstre ... g=UTF8&me=
What do you think?

I would suggest getting the NTK ones from Rockauto.

They are the same as the OEM, will fit 100% correctly, and read everything properly. $116 each on Rockauto.

The fronts are air fuel ratio sensors and the rears are oxygen sensors and it is unlikely that all four are bad. Only the front sensors actually affect drivability; the rears are stictly monitoring sensors. NTK or Denso sensors would be the only ones I'd use.