Buzzing sound from behind dashboard

[alleng]

Hi

Wow, my first post. Hope I find the answers to my annoying problem.

I have a BMW 325i E90 2007 model. Every time I start the car I get a buzzing sound coming from behind the stereo. A very distinct buzzing sound which lasts for about 30 seconds. The buzzing sound is definitely not from the speakers.

I ran a 'Check control' and there are no sensor faults or warning. After running the check control, the buzzing stops for a few trips then resumes.

I searched many forums but could not find any with a similar issue. Don't know where to start. Any ideas? Problem with stereo system perhaps?
I don't think there are any mechanical or sensor issues as the vehicle recently been serviced and diagnostics did not reveal anything out the ordinary.

HELP!

Regards,
Allen

 

[Truvalu]

Hi

Wow, my first post. Hope I find the answers to my annoying problem.

I have a BMW 325i E90 2007 model. Every time I start the car I get a buzzing sound coming from behind the stereo. A very distinct buzzing sound which lasts for about 30 seconds. The buzzing sound is definitely not from the speakers.

I ran a 'Check control' and there are no sensor faults or warning. After running the check control, the buzzing stops for a few trips then resumes.

I searched many forums but could not find any with a similar issue. Don't know where to start. Any ideas? Problem with stereo system perhaps?
I don't think there are any mechanical or sensor issues as the vehicle recently been serviced and diagnostics did not reveal anything out the ordinary.

HELP!

Regards,
Allen

Welcome!!

I have a E39 and my buzzing noise was from this.... I did this and had no buzzing since!

http://www.bmwfanatics.co.za/showthread.php?tid=9853

Hope you find it.

 

[alleng]

Thanks Truvalu

I will definitely consider the fan in my investigations. The thing is, this doesn't sound like the fan rubbing on dust. It is as if there is a buzzer being turned ON by the OBC and only happens a minute after starting the vehicle and not like you experience while the ignition is off as well.

When I find the solution will revert back, hopefully it is something simple like a dirty fan.

Thnx a mil for your input.

 

[Radar747]

Have you guys tried doom?? kills buzzing things :fencelook:


Sorry could'nt resist even if I have to laugh at my own jokes :roflol:

 

[Dippies]

:biglol::biglol::roflol::roflol:


Welcome to the Forum :thumbs: and if you post in the correct section more users will c thus more answers to your questions

 

[alleng]

Thanks Dippies

Learning curve man, will soon get the hang of it.

 

[Douglas]

Hi Allen
Is it a buzzing sound like a clock timer kind of buzz (alarm clock buzz) Or does it sound more like the electric buzz of an electric motor?

 

[alleng]

Hi Douglas

Sounds like an alarm clock buzz, very distinct and certainly not an electric buzz from a motor.

Refer dropbox link for soundclip.
https://www.dropbox.com/sh/9qzl21svejnt1xv/V_Qi30Mqyi

scroll towards end of clip to hear the sound.

NOTE: This problem goes away for a while after I run system 'Check Control'

Thanks a mil for your response.