I have just removed the head light from my 2013 370Z and pulled the ballast. It says
Panasonic Electric Works Co., Ltd. EANA26F 12907 and looks like this:
Note, this is also known as
Matsushita Gen V or VI D2S Ballast
Now, if somebody could confirm this really is a different ballast to the -2009 models then we know it's probably the ballast's fault why most HID bulbs don't fire up.
I believe a Gen IV D2S ballast ought to look like this(?)
If only I had a circuit diagram I'm sure I could modify it so that our ballasts work more broadly