I am so confused, so please have patience with me. I take it that the O2 sensor closest to the firewall is the Bosch 13201? - my car was made after the later date. When I look under the car, I see two other O2 sensors near the "Y" split - is the one on the pipe going to the front manifold Bank 2 and therefore the Bosch 13115? If this is correct, if I wanted to replace all four of my sensors, I would have to buy two 13115's and two 13201's? Thanks for educating me on this matter.

Originally posted by LUCA:
Yep. You can be Phil too if you'd like.