ok glad you got it sorted out. Is your X5 a diesel or petrol?

The dealer replaced the oil separator (aka CCV) but after 3 months later, oil leaked again. They replaced the intake manifold this time as oil was leaking from the seal.

Google "swirl flaps". Have a read of this thread if you have time:

BMW: E60 oil leak, intake manifold and swirl flap stuff • BMW 5 series Forum • BMWLand: BMW Forums

Diesel e70 2007

ok same as ours!