Yes, it'll buzz. If you're concerned with the function of the ICV, a quick test is to remove it and shake it. You should hear the plunger "clunk" back and forth inside. If you don't, try cleaning it out with brake parts cleaner. Carb cleaner or the like is too harsh and strips some of the coating inside the ICV.
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Is this a good deal? '87 325is w/ issues
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