Ordered a "4 wire" Bosch 02 sensor (part number O2S-6260) to replace my stock one, and got a question on the the wiring. I found the following link which is for the front sensor on an 8/9:

https://www.evolutionm.net/forums/ev...o2-sensor.html

With this schematic. Would this be correct for the X's rear o2 exhaust sensor?




Here's the sensor I ordered from Amazon. Thanks!

 

FWIW, I replaced my rear O2 with this one:


Plug and play, no wiring to solder or wires to get crossed. A bit more expensive than the one you bought, but it saves the extra labor and questions. Still, infinitely cheaper than the $300+ "OEM" ones that Mitsubishi tries to hawk.

I know this doesn't answer your question, but just though I'd share since it's related.

 

No that's great, I'm glad you shared! It'll hopefully help out others if they run into this thread searching for the same topic.