In my view, but obviously without calculation, the OEM hitch may or may not seem to be superior torsionally. The OEM hitch is robust, but seems to have four long bolts configured in a horizontal plane and one above and below on each side attaching into the reinforced box frame to hold the receiver bar to the system, and to resist twisting. The aftermarket receiver has a strut that to me would seem to provide significant torsional strength. Unless the strut bends or breaks, or the subframe component bends, the aftermarket receiver design may be near that of the OEM in terms of torsional resistance.

The way the OEM system replaces the rear bumper shock absorbers and anchors the solid inserts into the boxed rails certainly seems to provide much more significant system strength in tension.

The discussion should focus on observed failures of the revised design of the aftermarket hitch, if they exist, and the long term success of using the aftermarket hitch in the modes described, as well as comparing the OEM and aftermarket torsional design.

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2003 X5 Sport w/Premium Package M54 3.0L 6cyl