This was from a 2005 Lincoln Navigator and is a factory original.  I'm confident of that because I had to replace mine in a 2007 Town Car and the OEM part was an Italian made Osram but with a different part numbers.  The 2005 Navigator HID Ballast is 2 pin, while the 2007 Lincoln Town Car is 3 pin.  I know Lincoln sells the Town Car 3 pin Osrams for $950 EACH.  RockAuto prices theirs various brands start at $125 and up.  And for a real heart stopper, check around for other prices and strap on your safety belt.

I tried knockoffs on my Town Car and had problems with one that was trashed right off the bat due to poor fitment, and a second one that burnt out in less than 30 days.  They've been replaced, and so far, my lights working.

This Osram 2 pin ballast MAY fit additional cars, including maybe early Town Cars but the only thing I know for sure is they fit Navigators, 2003 to 2005.  Do yourself a favor and check yours first.

PRO TIP:  Be VERY CAREFUL removing the short cable that runs from bulb to ballast as it has the strangest pin connection and is difficult to remove (from the bulb).  I damaged a cable and had to replace it, so maybe you get to avoid that.