Hard to tell from the part numbers without the pictures, but I would guess no. There are two frame strengtheners (and the list doesn't indicate 2). There is the receiver itself, and the bumper insert that strengthens the bumper since it no longer has the shock absorbers. I think the carrier insert refers to the bumper insert, which would be required in the event of bodywork involving a bumper replacement.

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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