Hi mate,

Looks like that's the one (well housing anyway)

Breather will be inside, either vortex (ideal type) or the loo roll type. In some cases people leave it out if it previously has had a loo roll type! I found this to be the case on mine, however I soon fitted a vortex type.

Link below also highlights this to be it:

http://forum.bmw5.co.uk/topic/70763-...-to-change-it/