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02-25-2020, 02:10 PM | #1 |
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E90/E92/E93 BMW M3 Plenum Defect (How To Fix Whistle While Applying Slight Throttle)
There is a common defect on stock E9X plenums that causes a high pitched whistle at light throttle. It is more pronounced when a cold air intake is installed, and a pretty annoying sound. In this video I show you what causes it and how to fix it.
Here is a thread where other people had the same problem: https://www.m3post.com/forums/showthread.php?t=1417824 |
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08-04-2020, 08:23 PM | #2 | |
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08-04-2020, 08:54 PM | #3 | ||
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But the video you posted I am 99% sure that's the plenum issue. Doesn't hurt to check. |
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08-05-2020, 05:51 AM | #4 | |||
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08-07-2020, 02:51 PM | #6 |
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Perhaps the aftermarket carbon plenum still uses that OEM ring gasket that loosens itself causing the whistle. Take your carbon plenum off and look for that gasket thing that I showed in the video I posted.
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