That isn't a picture of a hitch that fits an X5, that is a generic drawing by an aftermarket hitch manufacturer.

If you want a decent hitch, go with OE. Costs more, but is the only one that attaches properly to the X5 unibody, and includes the wiring harness.

If you want a cheap hitch, buy any one, I don't think they are any different from one another.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
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