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Old 01-14-2012, 02:50 AM
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JCL JCL is offline
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Join Date: Mar 2005
Location: Vancouver, Canada
Posts: 11,853
JCL will become famous soon enoughJCL will become famous soon enough
I wouldn't go much bigger than the frontal area of the X3.

In terms of weight, with an X3 you can tow up to 1600 lbs without trailer brakes, and up to 3500 lbs with trailer brakes. That assumes the use of the OE BMW hitch, which has some restrictions on maximum drop and reach for the trailer ball from the hitch pin. No need for a dual axle trailer at that weight limit.

Recommend you use the OE hitch, it attaches nicely. You don't need the dealer to install it, any shop can do it or do it yourself if you are handy. The OE hitch also comes with an OE wiring interface, which turns off the rear PDC when a trailer is attached to stop the beeping. It also tells the vehicle that there is a trailer there, so you get the advantage of the Trailer Stability Control program in the DSC when towing.

Lots of posts if you search. Here is a shot of ours towing.
2007 X3 3.0si, 6 MT, Premium, White

2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver

2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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