Hi i bought a universal o2 sensor for my Subaru liberty 06 and its got 2 black wires for the heater circuit, does it matter if i mix the 2 up because i have to wire it to the plug of the old o2 sensor. Thanks
Don't do that. Those universal sensors are no good and Scotty has said many times to not use those because they often will not work right. Just find out who makes the OEM replacement sensor for your car and use that because your far better off with that than any crappy universal sensor.
o2 sensor from a parts store is worth $500 aud though ive rang several parts store all about the same price 🙁