I was given a list of codes and what they mean. I was also give the part #'s. The sensors are the same aren't they?

what I have:
OE Type with connector before catalyst
13115

Universal without connector before catalyst:
15730

I am going through the same problem right now. My mechanic tryed to charge me 775 for the fix and has cleared the code and I don't know what it is exactly but he did show me the read out and it did specify o2 sensors.
How do you get at them? And which one of the above do we need? I'm guessing the OE for best fit and ease of install but you may know better. Let me know please!


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