The OE film has been present since production started and is one piece. One of the first thing many F80 owners do (including myself) is to replace it with a larger piece of Xpel or similar because the OE piece is not high enough to prevent pitting on the fender above the OE film. If your roads are a good as those in Germany, you won't need to do this...for the rest of us, I highly recommend it!
If you are interested, there are a number of threads on the topic, including this one:
http://f80.bimmerpost.com/forums/sho....php?t=1296092