Ok I have this box on an x20xev as follows Gm 90400197 760 3
A25793f 13c3.74
So I'm guessing it's f13 as in the code but the box does not have f13 cast on the top like I'm used to seeing.
I'm wanting to replace the one above for this one
90446059 0081226
F15
A31631 c3.74 Gm
Just after some info on these boxes as I'm not sure any info is a help