I have a buzzing sound that comes from the center of the dashboard. It does it when the engine is under load at around 3-5 k rpm. I know it's not the vanos rattle as I have taken care of that. The noise sounds like a bee in the dash. Can't pinpoint it!
The head unit has a fan but it is not engine RPM dependent (to mask the noise of it). You probably have a cable resonating against something else. It is probably some kind of assembly issue.
Thanks for the post. I searched the forum prior with no luck. I'm definitely going to look into some of the topics mentioned.
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