335i Humming Noise from Dash... comes on and off in cycles

E90Tony · 01-15-2008, 07:10 PM

There's another thread on humming coming from dash but it's not quite the problem I'm having. For my car, the humming comes from the dash and it comes in cycles - i.e. it hums for 2 seconds, stops for a second, hums for 2 seconds, stops for a second.. repeat forever. This happens when the car is running and can be heard if there's not much cabin noise (i.e. radio volume is low). I have no idea what it is... but the fact that it comes in set cycles makes me think it's something electrical. Any thoughts?

ren · 01-15-2008, 07:29 PM

I have the same thing, same as everyone else. Check these out:

http://www.e90post.com/forums/showthread.php?t=105893
http://www.e90post.com/forums/showthread.php?t=103867
http://www.e90post.com/forums/showthread.php?t=50612

Tommy420 · 01-15-2008, 08:44 PM

Quote:

Originally Posted by erensf

I have the same thing, same as everyone else. Check these out:

http://www.e90post.com/forums/showthread.php?t=105893
http://www.e90post.com/forums/showthread.php?t=103867
http://www.e90post.com/forums/showthread.php?t=50612

+1. I noticed the same thing not too long ago. Don't know what it is, but it definitely sounds like it's something electric. Possibly navigation or stereo system...it sounds like it's coming from the car's computer system.

Lucky Song · 01-15-2008, 09:01 PM

same here!!

drkeng · 01-15-2008, 11:29 PM

just noticed it too, like last week for first time. seems only when I start the car. hum for about 1 sec, off about 1 sec. It seems to stop rather quickly. I have a short drive tomorrow morning--will try to pay more attention.

bonsai · 01-16-2008, 12:58 AM

could it be the cd or dvd spinning in your radio? I was puzzled by the sound that my DVD made while spinning around in my Nav-disc slot, then I figured out what it was.

That's the only humming sound I've ever heard come from my dash - and I'm anal about little noises coming from all around my car.

Tommy420 · 01-16-2008, 01:34 AM

Quote:

Originally Posted by bonsai

could it be the cd or dvd spinning in your radio? I was puzzled by the sound that my DVD made while spinning around in my Nav-disc slot, then I figured out what it was.

That's the only humming sound I've ever heard come from my dash - and I'm anal about little noises coming from all around my car.

No, this is something in additional to the spinning DVD sound. This sounds like some computerized thing, going off and on at 1 second intervals.

01-15-2008, 07:10 PM	#1
E90Tony Private 16 Rep 63 Posts Drives: E90 335i 6MT Join Date: May 2007 Location: SoCal iTrader: (0)	335i Humming Noise from Dash... comes on and off in cycles There's another thread on humming coming from dash but it's not quite the problem I'm having. For my car, the humming comes from the dash and it comes in cycles - i.e. it hums for 2 seconds, stops for a second, hums for 2 seconds, stops for a second.. repeat forever. This happens when the car is running and can be heard if there's not much cabin noise (i.e. radio volume is low). I have no idea what it is... but the fact that it comes in set cycles makes me think it's something electrical. Any thoughts?
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01-15-2008, 07:29 PM	#2
ren Captain 62 Rep 839 Posts Drives: 2024 X7 M60i Join Date: Jan 2007 Location: U.S. iTrader: (8)	I have the same thing, same as everyone else. Check these out: http://www.e90post.com/forums/showthread.php?t=105893 http://www.e90post.com/forums/showthread.php?t=103867 http://www.e90post.com/forums/showthread.php?t=50612
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01-15-2008, 09:01 PM	#4
Lucky Song Private 5 Rep 58 Posts Drives: 2007 metallic blue! Join Date: Sep 2007 Location: n.j iTrader: (0)	same here!!
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01-15-2008, 11:29 PM	#5
drkeng Major 156 Rep 1,014 Posts Drives: '18 M4 'vert Tanz Blue Join Date: Apr 2005 Location: Northbrook, IL iTrader: (0)	just noticed it too, like last week for first time. seems only when I start the car. hum for about 1 sec, off about 1 sec. It seems to stop rather quickly. I have a short drive tomorrow morning--will try to pay more attention. __________________ ///M4 'vert
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01-16-2008, 12:58 AM	#6
bonsai OG 3er 84 Rep 295 Posts Drives: 2016 F80 M3/2018 F82 M4 Compet Join Date: Sep 2007 Location: San Francisco, CA. iTrader: (0)	could it be the cd or dvd spinning in your radio? I was puzzled by the sound that my DVD made while spinning around in my Nav-disc slot, then I figured out what it was. That's the only humming sound I've ever heard come from my dash - and I'm anal about little noises coming from all around my car.
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