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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Faint Beeping Or Humming Interior Noise



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      02-10-2009, 02:19 AM   #1
GAaaAR
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Faint Beeping Or Humming Interior Noise

I get what sounds like a distant *Beeping* noise when my Heat is turned off. Hard to pinpoint where the noise is coming from. But you can't hear it from the outside of the car.

Sounds like a distant trailer backing up, but of course not as loud. Does anybody have this. It sounds faint and if my radio is on I cant hear it. If the heat is turned on the beeping noises stops pulsating but instead u hear a steady drone of the beep, but its so faint that if the noise stops pulsating your ears basically get use to it and starts to tune it out.

It can get pretty annoying when you have the radio off. The rhythm and volume of these beeping noises also changes and you never know how faint or loud its going to be or the pattern of the beeps. Sometimes you barely hear it and the beeps are coming in every 15 seconds. Sometimes it gets a little louder and you hear it ever 2 seconds. I also find the noise gets lower when driving.

Again it kinda reminds me of a distant trailer backing up and the beeping noise it makes.


Does anybody have this?
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      02-10-2009, 09:48 AM   #2
jcarlucci1
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I hear it..sounds like an intermittent humming noise..REALLY annoying..
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      02-10-2009, 10:38 AM   #3
Vnak
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i hear it too. it'll hum on and off. and doesn't stop.
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      02-10-2009, 11:03 AM   #4
Trelos
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I hear it too. It sounds like a fan to cool a CPU or something.
it sounds like it is coming from behind the passenger side of the dash.
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      02-10-2009, 11:12 AM   #5
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Quote:
Originally Posted by jcarlucci1 View Post
I hear it..sounds like an intermittent humming noise..REALLY annoying..
Quote:
Originally Posted by Vnak View Post
i hear it too. it'll hum on and off. and doesn't stop.
Quote:
Originally Posted by Trelos View Post
I hear it too. It sounds like a fan to cool a CPU or something.
it sounds like it is coming from behind the passenger side of the dash.

Just want to confirm we are all talking about the same thing. Does the noise lower or stops pulsating once the heat is on?


Have any of you guys brought it to the dealer to see what they have to say about this?
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      02-10-2009, 11:15 AM   #6
jcarlucci1
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Quote:
Originally Posted by Trelos View Post
I hear it too. It sounds like a fan to cool a CPU or something.
it sounds like it is coming from behind the passenger side of the dash.
Thats what I'm hearing..probably is the DME fan
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      05-23-2010, 11:32 AM   #7
ejmick
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finally...

i've found others that hear what i hear. i've got a 135i w 2000 miles and i can't stand the on/off/on/off buzzing, like a car alarm going off from a distance. first time i brought it to dealer i was told it was the fuel pump and thats the noise they make and that nothing could be done. then it got louder over the next month or so and when i took it back no one, nobody, could hear a thing. i'm very hard of hearing (i have aides) and i can hear it even with the radio on w low volume. once i put the a/c on the buzz goes steady. once i tough the gas pedal it disappears. haven't found any relief. anybody w good news?
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      05-23-2010, 11:40 AM   #8
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this is normal fellas. All bmws have a little technic type sound. At least in the 335 community. I sat in my boys 135 and it make the same noise. If you always hearing it all it means is that ur driving too slow.
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      05-23-2010, 11:41 AM   #9
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is it just with the heat or anytime the blower fan is operating, like if it was on ac mode would you hear it too?

does the speed of the beeping change as you raise or lower the speed of the fan.

do you hear it primarily on the first 3 lowest settings?
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      03-03-2013, 06:24 PM   #10
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I know this is a rather old thread but I just bought an E90 335i and hear the same humming noise too. It happens with or without AC but usually comes on when the engine is warmed up. Dealer also told me its due to the high pressure fuel pump. Has anyone managed to get rid of this annoying noise??
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