[Mark E M]

Ok, the OX sensor is baisicly junk any way, so if you bust off the top piece and the wires there is no loss. Whay happens is from repeated hot and cold cycles it has frozen in place. Heat the pipe around where it threads in , with a propane torch, will take about ten min. to heat up. Then spray the OX sensor with the WD-40 right at the threads, use the tiny plastic nozzle supplied with the WD to direct the spray right at the threads. Quickly put the wrench or socket on the OX sensor and try to remove. As soon as you get it to turn a little, rock it back and forth, and spray again.. You may need to heat it a couple of times to get it out. But once it comes loose the hard part is done. Once the sensor is out, coat the new ox sensor threads with anti-seize, do NOT get this on the ox sensor cover that goes into the exhaust pipe. Carefully thread in,avoiding cross threading, and hook up the wires and VOILA!! Your done. Hpoe this helps. Mark.