I am trying to change the o2 sensor, when I try to turn it, it won't budge at all. I have used WD-40 to loosen it up, that didn't help either, I am giving it till tomorrow as well to soak in maybe? But does anybody have any ideas on what to do? A easier way or a way to take it out? I heard letting the car run for a few before doing it helps, but the thing is I have to get under the car to do it, any ideas?

The car is a 2000 Subaru Legacy Outback

 

Ah man, I hate working on certain parts of the outback(like anything). Is it corroded and siezed? Try turning it tight first to loosen it up then turn left. And where did you end up getting on/price? Mom's 04 needs one soon.

 

get a torch and heat up the bung...then it will undo easily

 

you can heat it with a torch as another alternative. im sure its well hidden and in a terrible place for any human to get to. and probably is surrounded by many sharp metal objects.

 

Breaker bars and long pipes are your friend...

Do you have an o2 socket or are you just using a wrench?

 

breaker bar just speeds up the breaking off of the bung/rounding off or snapping the o2 sensor itself. If its ceased its ceased. heat or penatrant gets +1

 

I've heard of all that happening but have yet to actually see any of it happen...

 

Fuck WD40.

Try penetrating oil, it works better

 

not ky jelly...not that kind of penatrating oil...

 

PB Blaster type stuff works well.
O2 sockets are worthless when the sensor's seized. You may have to clip the wires/connector and use a deep socket to get a good bite. I'm not saying that's the right way to do it, but it's worked for me in the past. I've also taken the manifold to a shop before to get professional assistance.
Word of advice, when you do get it off, be sure to use anti-seize in the threads of the new sensor.

g/l.