I need how to connect a new upstream oxygen sensor .
The connector from the harness is melted .
I can see 2 black wires and 2 green/orange wires.
How to connect it to the black and white wires of the new sensor.
thanks a lot

 

The solid black wire connects to one white wire. The dark green/orange connects to the other white wire. (doesn't matter which one). The black/light blue wire connects to one black wire on the O2, and the black/dark green connects to the other black wire. Make sure you have an excellent connection, otherwise you may have driveablilty problems and/or the check engine light on.