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Couldn't really tell from just the quality of the vid..
If I had to guess I say check your DISA.
Simple way to confirm if it's bad > while the engine is idling - just press on the metal clip and disconnect its wiring harness, you should notice an immediate change in noise (if it's the main culprit.)
Last edited by BimmersGarage; 11-30-2012 at 04:18 PM.
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