I have 2008 Expedition EL, i was wondering if there is anyone out there that can help me. i am looking for a diagram of oxygen sensor locations and part numbers for each. I came across one awhile ago but seem to have lost it. I need to replace one of them but can not remember the part number for it and from what i remember i think there is 3 different part numbers for them. Any help would be great. Thanks

 

I just replaced one on my 2011 XLT. If you go to a site like Rockauto and look up the 02 sensors they will have the part numbers and they will be listed as front and rear. You will need to know that as well as which bank or which side of the engine. Your code Should tell you all that. Not too bad to change if you want to do it yourself. Good Luck.

 

Just in case:
Bank 1 is on passenger side.
Bank 2 is on driver side.
Sensor 1 is upstream of the cat.
Sensor 2 is downstream of the cat.