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      02-18-2020, 07:17 PM   #13
Silent9n54
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Drives: 2007 E92 335i
Join Date: Jul 2017
Location: Vancouver, Canada

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Quote:
Originally Posted by Ilma View Post
The humming noise sounds like the boost control solenoids bleeding air. They are located just behind the coolant tank, so that's where the noise is probably coming from - not the coolant tank.

Would be a good idea to replace them soon. Not expensive and not hard to diy.
they were replaced almost 2 years ago but i figured it might be the left one that was making noise but i didnt want to say anything because i wasnt sure, glad someone confirmed it !!
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2007 E92 335i / FBO + Inlets / E85 Custom Tune by WedgePerformance / 9.68 @ 140 / TPC Stage 2 19T / 2.1s 0-60 mph / 2010 535Xi 6MT - 437M - MHD / Instagram @Silent9n54
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