Mine is a 4.8 2006 and I replaced the regulator.
Number 5 here. Got it cheap from Craig at OpenRoad BMW. Make sure you tell him you are part of XoutPost club. Only way to get 15% over cost on genuine OE parts.
__________________
2006 4.8is, Black on White. SOLD Sniff Sniff.
2017 F85 x5m, Black on Red. BEAST MODE
"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain
Unlock OBC post 5