Replacing O2 sensors

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Originally Posted by mikefocke

Muffler shops charge $49.95 in my city to replace a O2 sensor that has the pigtail/connector. 6 months ago did it for my Boxster and in the same week for my CRV. Same charge.

If you have oil in there, you have more serious problems and are just wasting $ until you sort out the big problem (AOS, rings, ??)

I do recommend the Bosch ones with the pre-installed wires and connectors as the connection must be done by crimping or it gives false readings. And the Bosch people use robot machines and test afterwards to make sure the things are done right. I've seen too many horror stories from the cheap sensors to try and save the few dollars.

Cross reference of part numbers on my O2 sensors web page.

This is excellent advice Mike. +1