upstream O2 sensor bank 1 diagram

I have no picture or diagram. The upstream O2 sensors are before the catalytic converters and the downstream sensors are behind them. I believe that the upstream sensors are in the exhaust manifolds. You'll have to look for yourself. Bank one is the side of the engine that has #1 cylinder, FYI. If you need more information, here are two online sources for you: For AllData: http://bit.ly/AllData_Repair_Manuals_Online For Mitchell: http://bit.ly/mitchell_repair_manuals_online d pictures, here are some resources for you:

I can't believe nobody answered this in this manner.... You said you had to replace both sensors for upstream bank 1? Well, FYI, there are 2 upstream sensors and there are 2 bank 1 sensors, but there can only be 1 upstream bank 1 sensor, and it is the sensor on the side of the motor that the #1 cylinder is on, before the cat.