Got the P0141 on my 97 (under extended warranty). Called the closest dealer (two hours away) asking them to either insure the part was in stock, or to please order it so it would be there when I bring the car in. Parts couldn't figure out which one is the Bank1, sensor 2 part number. Tech guys wouldn't talk to me, service writer didn't have a clue. I've seen a couple different part numbers thrown out in my searches but am trying to nail down the part number so I can give it to the dealer, let them order it and only have to make one trip and actually get it fixed. I can't figure out from the parts diagrams which one is bank one, sensor 2 so sorry for my ignorance. I've no confidence the dealer will pick the right part even with the car there! I'd use an aftermarket replacement and DIY if it wasn't under the warranty. Thanks for any help.