It is really important to check your DISA valve when you start hearing weird rattling noises in the engine compartment..had the DISA valve fail in my 02 E39 and didn't pay too much attention to the sound until one day when the metal pin that holds the flap broke off and was sucked into the manifold and down into the combustion chamber...at this point it's either rebuilt the engine or scrap it!

Btw, do n62 motors have a DISA ?

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2006 X5 4.8is LeMans Blue / creambeige interior
Prod.date: 2006-06-21