The problem is the bumper pintle hitch as it is weak and can rip off if the trailer is too heavy. There is not allot of strength to the system and they are prone to failure. It really is a poor design and could have been better.
This if from a M1009 that had the pintle ripped off due to a heavy trailer when I bought it (fix & resale M1009). Fixed it and put the pintle back on, but I personally would not tow a M101 trailer with it even empty. You can get away with it empty, but with a load you risk this happening.

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On my previous M1009 that I owned for 3 years I installed a class V receiver hitch and removed the factory one. I have towed many M101 trailers empty and loaded once with no issues. I would recommend adding this if you plan to us a M101 for hauling with a load.



