i have a 93 pickup with a 22re 4wd. my upstream and downstream O2 went out on me so i'm looking at buying some new ones. i saw some made for japanese and usa built, i have a japanese built pickup but my motor is from a usa built pickup, so my question is do i need the O2's from a japanese built or an usa built.

 

Jap I'd assume, unless you swapped ECU's and wiring harnesses at the same time. Doesn't seem like it'd matter though. Still the same engine.

 

They both use DENSO sensors I believe. I had a Bosch on there once and swapped for a DENSO, but didn't really make a difference.

 

Use Denso only. Aftermarket just doesnt work well from my experience. Get the exact plug>> http://www.sparkplugs.com/Automotive...sors-c143.aspx

 

Just check to make sure the plugs are the same IE one wire oe yota pickup with the two bolt mounting plate like what came stock on mine. As for the sensors themselves they all will read 0v-1v, 0v being rich in oxygen and 1v being little or no oxygen. The only thing you need to worry about is how they bolt/screw in and what plugs they need.