Upstream Oxygen sensors

[fourdrinie]

Anyone know why Beck/Arnley O2 sensors (1563057)are same left and right while Standard Group are different models left 285 or right 291?

[GerryO]

I recall having the same question, before ordering two alike Denso replacements. The difference could be cable length. I might have kept my old ones. The passenger side manifold also has a threaded reducer bushing, that may want to come out along with the sensor. In my case I used the old driver side O2 sensor to chase its' galled ID threads

http://www.densoaftermarket.com/catalog ... ?part=o2sn

When I put my plenum back on, I was also surprised that the KS connector was the same as the two O2 sensor connectors.

[fourdrinie]

Just got the Standard Motor Products SG285 Oxygen sensor...seems to fit both left and right connectors...
Sent a note to Standard Motors on their website asking them for clarification of the difference...let's see if they respond.