I have had an aftermarket hitch from etrailers on my X since a week after I bought the car. I have pulled utility trailers, two large jet skis, and often have a 4 bike swing away rack mounted to it. I have checked the bolts a number of times since I installed it, and no issues yet. I also wouldn't recommend my hitch for pulling heavy loads, but for my use, it's more than adequate.

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2001 E53 X5 4.4i Sport
Titanium Silver / Black
141k miles, and broken down more than it runs...

2002 E46M3 Convertible with 28k miles - DD