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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 09-02-2010, 09:16 PM
chethanv chethanv is offline
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Mein Auto: 2010 BMW 335i Coupe
Wierd Fan Noise when the car is running

I have started noticing in my 2010 BMW 335i Coupe (usually on hot days) that a fan comes on and stays on for about 5 minutes, the frequency of the fan coming on varies by how hot the day is. The thing that is bothering me is the whining noise that the fan makes, any ideas ?
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  #2  
Old 09-02-2010, 10:13 PM
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PotatoAddict PotatoAddict is offline
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Mein Auto: 2007 BMW 335i
Is it coming from the engine? Could be the engine cooling fan. Is it coming from the trunk? Could be the sound system amplifier's cooling fan, which is a sound I get in my 2007 335i sedan.
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  #3  
Old 09-04-2010, 01:21 PM
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Red08X3 Red08X3 is offline
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Mein Auto: 2010 BMW 335i Sedan
I have the same thing with my 335i Sedan. It almost seems like the engine is idling too fast, but since it's not there the whole time I am assuming a cooling fan as well.
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  #4  
Old 09-04-2010, 04:15 PM
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markl53 markl53 is offline
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My 335i does this as well, only on very hot days or in very heavy traffic. I've decided it's just an auxiliary cooling fan that starts running much faster. I can feel the vibration, mostly at idle but even at speed. We had some VERY hot days, ambient temp 98+. During those times the fan ran almost continuously in spite of the fact that the engine (oil) temp was not higher than normal. After the engine cools a bit, the fan either shuts off or slows to normal speed where you don't notice it.
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  #5  
Old 09-04-2010, 04:20 PM
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paximperium paximperium is offline
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Mein Auto: 2008 335i Coupe
Air conditioning fan?
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  #6  
Old 09-04-2010, 04:30 PM
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hpowders hpowders is offline
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The weirdest fan noise I ever heard was at the World Cup in South Africa.
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The E90 sedan is the last in the line of great 4 door 3 Series BMW's. Too bad.

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06/02/2005-06/02/2014: 9 great years on Bimmerfest!!!

Last edited by hpowders; 09-04-2010 at 04:32 PM.
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Old 09-04-2010, 05:05 PM
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markl53 markl53 is offline
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Quote:
Originally Posted by hpowders View Post
the weirdest fan noise i ever heard was at the world cup in south africa.
lol
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Prior: 2011 535i AT | Black Sapphire/Cinnamon | Premium | Heated Sts | Nav | Sirius | Anthracite Hdr & Trim
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  #8  
Old 09-04-2010, 08:45 PM
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hpowders hpowders is offline
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Quote:
Originally Posted by markl53 View Post
lol
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There is no more beautiful car on Bimmerfest than my gorgeous Forest Green Porsche 911 coupe!


Porsche: Accept no substitute, unless you're poor!

The E90 sedan is the last in the line of great 4 door 3 Series BMW's. Too bad.

"The VW GTI remains and will likely continue to be one of the finest compact sports cars in the world." Christian Seabaugh, Motortrend, March 27, 2012.

06/02/2005-06/02/2014: 9 great years on Bimmerfest!!!
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