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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Noise/Vibration - Subtle at Cold Idle



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      10-24-2013, 08:19 AM   #1
nrrm1127
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Noise/Vibration - Subtle at Cold Idle

I have a small problem, 2011 E90 328i here, hearing a slight humming vibrating from something in the bottom end of the motor/header (possibly?) when car is idling cold. Once warmed up noise seems to disappear. Thoughts from anyone? I have BMW PE so not sure if maybe one of the clamps needs adjustment.
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      10-24-2013, 04:59 PM   #2
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If u can feel the problem from the pedal I have the same problem (2009 e92 n51 328i). The vibration used to happen all the time when I start up the car in the morning. Ever since a month ago the vibrating just stopped on its own.
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      11-07-2013, 10:56 PM   #3
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I feel the exact same thing!! On the brake pedal. Been going on for about a month and a half. No idea what it is. (2011, 328)
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      11-08-2013, 08:55 AM   #4
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Yeah this seems to get worse when it's colder outside which leads me to believe the BMW PE I have is out of alignment. I was backing up about a month and a half ago and swerved to avoid some idiot behind me, backed the tip right into a curb and pushed the whole exhaust to the left. I was able to straighten it out on the hanger, but I guess I knocked it out of alignment more than I thought. The noise appears to be coming from just after the header.

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If u can feel the problem from the pedal I have the same problem (2009 e92 n51 328i). The vibration used to happen all the time when I start up the car in the morning. Ever since a month ago the vibrating just stopped on its own.
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      11-08-2013, 01:54 PM   #5
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So I messed with mine a little this morning and apparently if I take it out of gear, the vibration on the pedal goes away...
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      11-08-2013, 04:01 PM   #6
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Mine does it regardless of whether I'm in neutral or not.

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So I messed with mine a little this morning and apparently if I take it out of gear, the vibration on the pedal goes away...
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