Just wondering , Are bank 1 and bank 2 sensors the same sensor or are they different . I am about to replace one on front and that dirtly little guy at the back of engin.. Thanks.Norm
Thanks for your reply, I have a 2011 ford edge with a 3.5 motor .Looking to replace 2 sensors .One in front of motor and one at the back. i think they are both upstream . Just not sure.