That is the correct factory front diff breather hose breather cap and all.
If you do not have one like that it is not std.
regards
Drag
any volunteers to upload a pic of this breather on the V6 3.2?
I found the part number is 0AA301047M but the picture of the breather on then internet does not look like the hose I have.
Maybe the previous owner replaced it with a standard hose.