This was totally wrong!!! How were you able to remove (oxygen sensors) located at the catalyst muffler by hand without using tools....
However I'm struggling with mine to replace, I was finally able to change one yesterday but the other one @ the front by the passenger side seems to be hell welded to the muffler. And I'm having big difficulty to get access to this one to remove it. Now the O2 sensor head become a little loose and wont come out easily, even after using 3 differents spray to loosen the part.