I also just purchased a X5 4.4 with no hitch. My boat weighs in at 3500 # and I just purchased and installed the Curt hitch rated at 5000#. It seems very well built and is the same brand I have used for years on my 4x4s. It still mounts to exactly the same locations as the factory hitch. Installation was not too bad took me 3 hours , but I was not rushing didn't want to scratch anything. You will need a helper the rear clip comes off as one big piece and is a hand full to line up. Hitch comes with bolts and good instructions, you will have to drill out one hole in ea of the bumper shock mount so you will need a 1/2'' shank 9/16 drill bit for that. It turned out to be a clean install. I then installed my 5 pin flat wiring harness. I had to purchase the European converter to get the trailer lights to work correctly another $30 bucks. When finished towed my boat just fine.