i have done four x5 3.0d facelift turbo replacements (3 due to breather not been changed & 1 just wear 110k) & have never seen swirlflaps on any of them

hope this helps
but i would not worry about flaps

change ur breather every 20k if short journeys & every 30k if long trips mainly its only £19+vat if u have the modded breather which came out in 2005 if u dont u
can change to the new design for £40+vat

part no--modded Breather assembly----- 11127799225 --£40+vat
partno--filter assembly for breather------ 11127799366---£19+vat
hope this helps[/quote]
Just checked mine with no sign of swirl flaps thank god, however I did remove the oil filler cap whilst the engine was running and guess what .... smoke ,so I need a breather assembly. looking on Realoem it comes up with a different part number than the one above so i assume mine as its pre 2005 is the old style. My question is do i just oder part number 1112779925 ? Sunday tomorrow so it will have to wait till next week.
Cheers