well i just dropped $200 bucks at the parts store, came home to swap out the o2 sensors, got the special socket for it and all, drivers side came out in seconds, no problem passenger side, little harder to get to, looks different than the other, (was told they should be the same) socket doesnt fit, no wrench on earth would fit, cresent wrench and vise grip no good, its stuck.....good, looks like im just gonna pay someone to get it out
tighten it slightly then try loosing it, if this doesnt work use a torch to heat it and the area around it once u get it out then be sure to put anitseeze on the new one