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2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums General 5-Series Sedan and Wagon (F10 / F11) Forum Strange whistle-blowing sound from middle air vents
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      08-25-2015, 01:21 AM   #1
ducy
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Strange whistle-blowing sound from middle air vents

Hello

I have F11, 2013
The problem with strange sound occur from the middle front air vent.
The strange “whistle sound” ... or like “air leakage” is heard.
The sound is not related with the rpm of the fan ventilation. Therefore its more heard when ventilation rpm are lower and “normal” air voice is not much heard.
And it occur when AC is off (and also when ON). Also no matter if the car is moving or stationary.
The sound goes on and off time to time ... but it’s mostly on… and its randomly, so cannot reproduce it when I would want.

*UPDATE: the sound is present only when engine is running. When engine is OFF and only ignition ON so air is blowing, the sound is gone.
**UPDATE: the sound is present only when on AUTO. (but not 100% sure yet)

I recorded the sound, if you listen carefully you
can notice it.
Normal sound:
https://drive.google.com/file/d/0B_j...ew?usp=sharing

Fault sound:
https://drive.google.com/file/d/0B_j...ew?usp=sharing

Any other have the same problem? Any solutions?

Thanks!
Best.

Last edited by ducy; 08-26-2015 at 04:11 AM..
Appreciate 0
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