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F10 / F11 (2011 - Current)
The new chapter in the highly successful story of the BMW 5 Series Sedan (F10) and wagon (F11)

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  #1  
Old 07-08-2012, 10:00 PM
jaypeadoubleyou jaypeadoubleyou is offline
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Question Electrical humming when car is off

My 535i is two weeks old. When you shut it off, and lock the doors, within minutes there is a high pitched "electric" humming sound that last about 5 seconds when it happens every couple minutes. At first I assumed it was because the car was new. But it happens every time and lasts an hour....anyone else having same issue?

Ive read all about the battery issues from others....did any of you have same sound?

Have service appt in a couples days....advisor said that isn't normal.
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  #2  
Old 07-09-2012, 04:38 AM
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Needsdecaf Needsdecaf is offline
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Is it a hum or a high screech?

I have the screech. You can barely hear it at the end of this video.
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Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians
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  #3  
Old 07-09-2012, 06:20 AM
jaypeadoubleyou jaypeadoubleyou is offline
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Yep....thats the noise.

Sounds like an electric motor to me....but does yours last for about an hour?

Have you had it checked?
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  #4  
Old 07-09-2012, 06:25 AM
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Needsdecaf Needsdecaf is offline
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Quote:
Originally Posted by jaypeadoubleyou View Post
Yep....thats the noise.

Sounds like an electric motor to me....but does yours last for about an hour?

Have you had it checked?
Yes, had it checked, but no one can figure it out. It starts up maybe a half hour after the car's been shut off and goes on for a while. I'm not sure how long it lasts. Each "screech" lasts maybe 10 seconds and doesn't re-appear for a minute or two.

Come to think of it, I'm not sure I've heard it since I had the global software update.
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2011 535i
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Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians

Last edited by Needsdecaf; 07-09-2012 at 06:26 AM.
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  #5  
Old 07-09-2012, 10:49 AM
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AutoUnion AutoUnion is offline
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Fuel pump? I know some Euro cars, you can hear the pump priming when you hit unlock on the keyfob.

Oil pump? I vaguely remember reading somewhere that the oil pump circulates oil thru the turbos to increase their life span because you are supposed to let turbos "cool down" before you shut off the car.

Not sure.
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  #6  
Old 07-09-2012, 08:46 PM
jaypeadoubleyou jaypeadoubleyou is offline
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Thanks for the thoughts. It only does it after the car is off and locked.
I know what noise you are talking about when you unlock...all my cars have done that before.

Hopefully the global software update will do something.
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  #7  
Old 07-09-2012, 11:32 PM
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Needsdecaf Needsdecaf is offline
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It does not sound like anything mechanical - not a fan, pump, etc.

The best way to describe it is that it sounds 100% electronic. Like capacitors discharging or something........
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2011 535i
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood Gone but not forgotten.

Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians
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  #8  
Old 07-10-2012, 12:13 AM
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seemyad seemyad is offline
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Quote:
Originally Posted by jaypeadoubleyou View Post
Thanks for the thoughts. It only does it after the car is off and locked.
I know what noise you are talking about when you unlock...all my cars have done that before.

Hopefully the global software update will do something.
Have you tried popping the hood before locking the car and then lifting the hood when the sound starts to see if you can pin point the location?
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  #9  
Old 07-10-2012, 04:37 AM
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Needsdecaf Needsdecaf is offline
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Originally Posted by seemyad View Post
Have you tried popping the hood before locking the car and then lifting the hood when the sound starts to see if you can pin point the location?
I have on mine. Sounds like its coming from near the headlights.
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2011 535i
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood Gone but not forgotten.

Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians
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  #10  
Old 07-10-2012, 06:24 AM
jaypeadoubleyou jaypeadoubleyou is offline
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I have yet to look under the hood....But when standing next to car it sounds like its coming from the wheels/headlight area. Very strange!
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  #11  
Old 07-10-2012, 06:57 AM
Stonehauler Stonehauler is offline
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Electric water pump motor?
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  #12  
Old 07-10-2012, 08:48 AM
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Needsdecaf Needsdecaf is offline
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Quote:
Originally Posted by jaypeadoubleyou View Post
I have yet to look under the hood....But when standing next to car it sounds like its coming from the wheels/headlight area. Very strange!
Yup that's it.
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2011 535i
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood Gone but not forgotten.

Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians
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  #13  
Old 07-10-2012, 08:50 AM
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Needsdecaf Needsdecaf is offline
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Quote:
Originally Posted by Stonehauler View Post
Electric water pump motor?
It does not sound like any kind of pump or other mechanical object.

It sounds like an out of tune high violin string. A loud, synthesized version.
__________________
2011 535i
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood Gone but not forgotten.

Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians
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  #14  
Old 07-10-2012, 08:07 PM
jaypeadoubleyou jaypeadoubleyou is offline
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Service appointment is tomorrow at 7:20 am. Will post results if any.
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  #15  
Old 07-11-2012, 08:22 PM
jaypeadoubleyou jaypeadoubleyou is offline
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So...as suspected, they could not identify the noise, but figure it is the water pump cooling the car. So thats that.
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  #16  
Old 07-12-2012, 05:03 AM
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Needsdecaf Needsdecaf is offline
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Quote:
Originally Posted by jaypeadoubleyou View Post
So...as suspected, they could not identify the noise, but figure it is the water pump cooling the car. So thats that.
Same BS answer I got. If that's what the water pump sounds like, then they need a new water pump design.

Also the water pump, you know, pumps water. Which would be audible. I have listened with the hood open and my head inside. There are ZERO water noises / pumping noises (I am an engineer, I am used to listening to mechanical sounds).

The problem is that this thing is so transient that no dealership is ever going to let a tech sit around and wait for it to occur. So you get "could not duplicate" with some lame guess as to the reason and that's it. Whatever.

As long as there's nothing wrong, I'll just deal with it. Like I said though, I haven't heard it since the software update......

If you really want to capture it, set up a camera and hit record.
__________________
2011 535i
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood Gone but not forgotten.

Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians
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  #17  
Old 07-12-2012, 05:55 AM
jaypeadoubleyou jaypeadoubleyou is offline
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I actually played the video that you posted. The service tech even stated that that noise was not normal. But they "could not duplicate" so it is what it is.

He said it should not be of concern....so hopefully he is correct.
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  #18  
Old 07-12-2012, 06:26 AM
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Needsdecaf Needsdecaf is offline
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Quote:
Originally Posted by jaypeadoubleyou View Post
I actually played the video that you posted. The service tech even stated that that noise was not normal. But they "could not duplicate" so it is what it is.

He said it should not be of concern....so hopefully he is correct.
That's what I'm going with too.
__________________
2011 535i
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood Gone but not forgotten.

Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.

Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians
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  #19  
Old 11-26-2012, 06:09 PM
mdourney mdourney is offline
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Screech as well 2012 535

Long time readed first time BMW owner and poster. Fantastic resource and community. I have the same exact noise. To me it sounds like it is coming from near the engine block, on thee driver's side. I will attempt to attach an audio recording, but it's the exact same noise. Will let you know if my dealer has any other words of wisdom. Thanks again.
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  #20  
Old 05-26-2014, 11:20 AM
Fox Fox is offline
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Did anyone ever find out what this is? I've just bought an F10 and I was washing the cars this afternoon, all locked, and it was just sitting there humming and whirring away.
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  #21  
Old 04-05-2015, 06:36 AM
Caesonia Caesonia is online now
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Originally Posted by Fox View Post
Did anyone ever find out what this is? I've just bought an F10 and I was washing the cars this afternoon, all locked, and it was just sitting there humming and whirring away.
Did anyone ever understand what this was? I have now started hearing this sound on my 2010 528i after BMW did a warranty software update to fix a tranny shift issue.
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  #22  
Old 04-29-2015, 09:23 PM
jaypeadoubleyou jaypeadoubleyou is offline
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Never got an answer, Traded the car in after about 9 months. Just purchased a 750i last weekend, so will see if it does the same thing and keep you posted.
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  #23  
Old 05-15-2015, 04:59 PM
dwpatter53 dwpatter53 is offline
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electric rad fans

Hi;

Possibly the electric fan(s) on the radiator and water pump(?) and oil pump(?).

My 99 Nissan Maxima would run it's electic fan for a while after being turned off.
All modern cars have electric rad fans, saves fuel and only runs when extra cooling is required.

My 550ix also hums after it is turned off.
Who knows what else is running to also cool down the turbos.
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  #24  
Old 05-15-2015, 06:22 PM
shadowyman shadowyman is offline
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That is completely electric and on purpose. That's all I can say.
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  #25  
Old 05-15-2015, 09:50 PM
dnet dnet is offline
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When my car engine is off and I sit in the car the parking brake light on the dash also goes and off which coincide with the sound that goes on and off. Does anyone notice the same thing?
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