It's very easy to install. BMW is very smart. When I first saw it, I was wondering how to install it because unlike my previous cars, there's no marks on the bumper. Move the bracket along the bumper and it will "click" with at the bottom. You then just hand screw through the holes to install the bracket then put the plate on. If you don't want to screw the bumper, use the provided double sided tapes. They're brilliant. I personally don't want dealer to do this. They don't put care in doing it and at one point in the past I ended up with a slanted plate.
Found the video I used before.
Here it is. Ours has alignment tabs.