Thanks! I may go the freeze off route. I don't feel the most comfortable torching my car. Lets hope I can get this taken care of once and for all today!

 

I tried for three hours, with freeze off, hammers, and I still can't get the thing to come loose. I think the main issue is that the actual O2 socket (3/8" Offset Oxygen Sensor Wrench).

The part where you attach it to the ratchet tends to slide around, not locking in. I'm to the point where if I do any more yanking, I may do some serious damage so this might have to go to a shop.

 

Vise grips and a hammer might work. Depends whether you have room to attach vise grips and swing the hammer.

All of us have had occasions where we cried "calf roped" and get some professional help.

good luck

 

Quick update! I purchased some ramps (probably the best investment I've made in awhile) in an attempt to get to it again. After about three hours, I gave up. The sensor is starting to round out too, which has lowered my confidence quite a bit.

If that shield wasn't surrounding the sensor, it would be a lot easier to get to.

 

It has been fixed! I took it to a local garage and they replaced it for $30. All is well on the Western front now!

 

Thanks for the follow up.....