Odd engine sound

apc3libras · 11-10-2011, 02:28 PM

I have had this strange buzzing or humming sound for the past couple of weeks. It kinda sounds like something is vibrating but I haven't narrowed the location of the sound yet. It happens around 1500-2000 rpm in third gear (I think). I have an auto transmission. When I accelerate from a stop light in D mode, I can feel the trans. shift, then shifts again. After the third shift, the rpm settles around 1500 rpm, then I can hear the sound. It isn't very loud. If I rev past 2000, the sound is gone but as soon as I slow back down it starts again.

I will get a video clip up today on my way home that will probably help.

Thanks guys.

benzo23 · 11-10-2011, 02:35 PM

Dude you're going to have to be way more descriptive then that. Every internal combustion engine ever created has some sort of humming or buzzing sound lol, try to get a video and try to narrow down the sound

apc3libras · 11-11-2011, 01:03 PM

UPDATE - Here is a video. Listen in HD mode. The vibrate/humming/buzzing sound occurs at :12, :19 until :23 and :28 until :30. Turn up speakers to hear clearly. It sounds like the things on the outside of the freeway lane that are supposed to wake you up if your tire goes over them, but quieter.

fdriller9 · 11-11-2011, 01:23 PM

I don't hear a thing. Thy drive around in M mode, M3.

11-10-2011, 02:28 PM	#1
apc3libras Lieutenant Colonel 35 Rep 1,691 Posts Drives: E36 M3 Join Date: Nov 2010 Location: UTAH iTrader: (3) Garage List 1999 BMW M3 [4.00]	Odd engine sound - buzzing or humming I have had this strange buzzing or humming sound for the past couple of weeks. It kinda sounds like something is vibrating but I haven't narrowed the location of the sound yet. It happens around 1500-2000 rpm in third gear (I think). I have an auto transmission. When I accelerate from a stop light in D mode, I can feel the trans. shift, then shifts again. After the third shift, the rpm settles around 1500 rpm, then I can hear the sound. It isn't very loud. If I rev past 2000, the sound is gone but as soon as I slow back down it starts again. I will get a video clip up today on my way home that will probably help. Thanks guys. __________________ 2007 BMW 328I Monaco Blue /// 1999 BMW M3 Titanium Silver /// 2007 BMW 328I Sparkling Graphite (sold) Last edited by apc3libras; 11-11-2011 at 01:03 PM..
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11-10-2011, 02:35 PM	#2
benzo23 Colonel 74 Rep 2,848 Posts Drives: 14 F30 AW MSport Join Date: Apr 2010 Location: FL iTrader: (1)	Dude you're going to have to be way more descriptive then that. Every internal combustion engine ever created has some sort of humming or buzzing sound lol, try to get a video and try to narrow down the sound
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11-11-2011, 01:03 PM	#3
apc3libras Lieutenant Colonel 35 Rep 1,691 Posts Drives: E36 M3 Join Date: Nov 2010 Location: UTAH iTrader: (3) Garage List 1999 BMW M3 [4.00]	UPDATE - Here is a video. Listen in HD mode. The vibrate/humming/buzzing sound occurs at :12, :19 until :23 and :28 until :30. Turn up speakers to hear clearly. It sounds like the things on the outside of the freeway lane that are supposed to wake you up if your tire goes over them, but quieter. __________________ 2007 BMW 328I Monaco Blue /// 1999 BMW M3 Titanium Silver /// 2007 BMW 328I Sparkling Graphite (sold) Last edited by apc3libras; 11-11-2011 at 01:39 PM..
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11-11-2011, 01:23 PM	#4
fdriller9 Banned 253 Rep 7,089 Posts Drives: '06 AW 330xi Join Date: Mar 2009 Location: North Jersey/Philly/NYC iTrader: (4) Garage List 2006 330xi [6.44]	I don't hear a thing. Thy drive around in M mode, M3.
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