pass. side o2
 

how did u guys get to the passenger side oxygen sensor? is the only way to remove the y-pipe?

im thinking i can get it from up top......

I went to replace both of mine the other day, and found out the passenger one had already been replaced, so I didn't bother with trying to get to it. Looked like the only way was to remove the y-pipe though. Going from the top looked too hard.

Used an O2 socket from underneath, without removing anything. There was barely enough room to break it loose and swing the ratchet.