So the plug of my 02 sensor broke after I ran over some crap on the road, all I have now is 4 wires hanging, this is the plug that plugs into the O2 sensor, so I'm guessing it's part of the engine harness? Could anyone verify that it is the engine harness and maybe give me a part number for it? I'm trying to find a used harness and want to make sure that it's the engine harness that have the two plugs for the o2 sensors

 

Yes its part of the engine control harness not to be confused with engine room harness
Call your local dealer with your vin to get the correct part number...or pop your hood and remove the engine cover there should be a tag somewhere on the harness with a part number