hey i've tried courtesyparts.com and the dealership but both haven't been helpful. my OBD scanner says bank1 sensor1 as the one that is bad. can some1 tell me which one it is? i think its the one that goes into the y-pipe, like the first bend that goes up... but i'm not sure. can some1 help me out. thanx

 

The bank closest to the fire wall is bank one.
The first O2 in the system after the exhaust manifold is sensor one.

 

hey i'm still confused though... online it says before cat, after cat, left side, right side. still confused lol