no, it is not. They are strictly aftermarket made by FK, Inpro and a few others now....another user over on http://www.vwvortex.com named Cullen or "EuroCullen" also sells a set of these that he had personally tooled and built. They are not made from the factory and are NOT OEM. Some sets will requir slight adjustments to make them sit perfectly flush, and be sure to use the lowest wattage bulbs you can find (in my FK set, a bulb actually melted through its plastic holder and effed some stuff in the tail light up....not something an OEM part would do :x ).
Personally, I didn't have to splice any wiring...they connected right to all of my existing wiring and plugged/screwed right in. And once I installed them, I wasn't sorry :D