Quote:
Originally Posted by FunfDreisig
I have no doubt that an X5 35d can haul a 5,000 lb. rig, even with several hundred more pounds of load (gas, boating equipment, etc.). But I wouldn't recommend doing this on a regular basis for long runs at freeway speeds or mountains. IMO the issue is the automatic transmission, which is reported to be a fairly common weak point on X5s.
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It's hard to argue for or against this from personal experience since it's hard for even BMW to know for sure but I've towed for many highway miles at 5,000+lbs with no transmission issues at all. The diesel is likely even better than my 2003 4.4i (torque is higher and transmission is better).