Originally Posted By: calvinnnnnnnnn
when the tech started removing the sensor, it got harder and harder. if they forced the sensor to come off, three things can happen: the 02 sensor snaps, the threads strip or it comes off fine(less likely)
if it strips, but comes off, you cant thread in the new sensor. if the bolt snaps, you have to drill it and i dont know happens after that.
sorry, i clicked the wrong quote button. i was questioning his "an air/fuel sensor is not an oxygen sensor"
oxygen sensors ARE air/fuel sensors.. thats all they do. now he could have been talking about the differences in a normal o2 sensor and a wideband o2 sensor, but these days (esp considering the cost of your OEM sensor) it seems a lot of automakers are using wideband o2 sensors in OEM applications.
in any case, i'm not sure where the part is located but i think thats pretty ridiculous. the o2 sensors should have antiseize on the threads. are they not using any type of penetrating oil?
edit: checking rock auto, the pre-cat o2 sensor is in fact a wideband model.