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Weird buzzing noise in cabin

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Old 05-06-2021, 11:31 PM
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2015 c400
Weird buzzing noise in cabin

Hey yall, I recently installed an awe track exhaust on my 2015 c400 and around an hour after, i started hearing a loud buzzing noise in my cabin somewhere in front of the driver seat and infotainment system. I don’t know if this was a coincidence or if my exhaust is somehow making this noise. It only happens from around 1k-3k rpm. Maybe yall have an idea of what my problem might be?

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Old 05-08-2021, 09:48 AM
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At certain rpm, your exhaust is vibrating more and is hitting the heat shield or hanger or the chassis itself.
Old 05-08-2021, 09:02 PM
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Originally Posted by stockbmw
At certain rpm, your exhaust is vibrating more and is hitting the heat shield or hanger or the chassis itself.
I made sure that the exhaust was not touching anything except rubber hangers

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