The CCV on the 4.8is is on each bank of the motor, on top. Remove the top cover and it will be staring at you. Looks like the cover of a peanut butter jar, black.
It's not like the older motors with the old style CCV/oil separator.
Easier and cheaper to replace.
Item number 13 below:
RealOEM.com * BMW E53 X5 4.8is Cylinder head cover