Car wiring diagrams: Bmw X5 Towing Harness, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. Get BMW X expert reviews, new and used X prices and ratings. View BMW X specs, pictures, and get buying advice at The Car Connection..This hitch is for the X non M Sport Pkg , and it includes a wiring harness for trailer lights. The hitch bolts on easily and offers a nice, clean look . BMW X Tow Hitch Recommendation X F Current .