My rear o2 sensor wiring is hacked up. I am wanting to replace it with oem so that i have the plug but not sure what I need. Does it connect into the main engine wiring harness or someplace else. Can someone link me to either the part of the harness i need or the plugs I need. Thanks for the help

 

Looks like you can get a new oxygen sensor from RockAuto for $74. (EvoVIII). By the looks of the downstream sensor picture, there is a grommet which would indicate the sensor being plugged in somewhere in the cabin (under the driver's seat maybe?). My advice would be to either hit the junkyard up for other vehicles of the same make and era (its a standard Bosch connector) or do some splicing.

 

I will prolly do the splicing but my question was where does the wiring go too. I bought the aem kit so i have the sensor with the plug, but i am wanting the other end of the plug. So I need to know what wiring it is apart of (engine bay wiring harness????) or where can i buy a brand new plug??