Unfortunately, the bumper carrier [if you mean the long replacement bumper covered by the plastic bumper cover [d in the parts list, shown in picture G in the official install document] is quite different than the even heavier bumper carrier it replaces. you gotta have it. Be sure and get the two plastic 'cups' that go on the end, too, and don't disconnect them from the scavenged bumper carrier. Their install is counterintuitive. You have the install document, right?

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2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.