If the CCV system is showing blockage to any level I suggest replacing all components. Not that expensive and that is best practice.

I think the hose you are talking about may be this one? There is no hose going to the MAF.

RealOEM.com - Online BMW Parts Catalog

I am aware you have a 4.8 rather than a 4.6.

__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas