ok yeah cause i think bank 1 sensor 1 is the sensor on the back side near firewall and i guess the other one would be the one right on top.So is bak 2 sensor one the one right on top when u open hood? So actually tomorrow i can call and give them part number to the sensor that is right on the top when you open hood and that will tell me if i have regular o2 sensors or air/ fuel sensors.