91 FJ80 Denso O2 sensors PN#'s 234-4150 and 234-4051 (1 Viewer)

[jomichael]

I just received two Denso PN#'s 234-4150 and 234-4051 O2 sensors. Is one designed for the inside pipe vs the outside pipe? If it doesn't matter, why the two different part numbers?

 

[jomichael]

I just received two Denso PN#'s 234-4150 and 234-4051 O2 sensors. Is one designed for the inside pipe vs the outside pipe? If it doesn't matter, why the two different part numbers?

I think I just answered my own question. 2344051 says upstream left while 2344150 is upstream right. Uh, which is left? looking at the front of the vehicle or back?

 

[ColoradoBoy]

I think I just answered my own question. 2344051 says upstream left while 2344150 is upstream right. Uh, which is left? looking at the front of the vehicle or back?

Any chance they have different plugs? Match them up...(?)

 

[proteolytic]

Left relative from the driver's perspective. Left O2 is closest to drivers door (but below of course) and right to the right of that.

 

[Desert Dino]

They are identical except for the length of the pig tail you can use the long one in both positions.

 

[jomichael]

They are identical except for the length of the pig tail you can use the long one in both positions.

Thanks, I would have hated to guess and get it wrong!

 

[jomichael]

Thanks, I would have hated to guess and get it wrong!

Got em installed and what a difference! The truck runs so much better and smoother now.