LUP15 just so you know - that number is a part
code - as in all oxygen sensors will have the same part code because they are all oxygen sensors. To get the part
number from fast you get a list of the parts you want numbers for then in the main window press F5 (or tools->p/n search).
e.g.
the part number for the u13 oxygen sensor is 22690-1E00 while the s13 is 22690-50F00, so they are different.
FAST can be quite a confusing program, but once you get the hang of it - it's awesome