X-3 trailer hitch Mi.ke, I have an 2004 X-3 with a factory hitch. Before purchasing the hitch, I went to my local dealers parts dept and they had installation instructions that came with the factory hitch which they were kind enough to photo copy before I actually made the purchase. I was contemplating a cheaper generic hitch but decided to go with the BMW part, you also may consider purchasing the lighting module. Try getting a club discount, see if they will match one of the "ROUNDEL" BMW dealer ads. Good luck and enjoy your X-3, Norm...