Hello. Can anyone out there tell me where cylinder 1 is locate on a 4.7L that I have in my 2002 Sequioa? The O2 sensor in bank 1 is bad which means it is pre-cat but then it states that it is the sensor closest to cylinder 1. This is where I need the help since there are 2 pre-cat sensors on this truck. Drivers or passengers side? Thanks in advance.

 

#1 is the left front of the engine (left as if you are sitting in the truck)

 

Thank you very much!!!