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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 09-30-2011, 08:44 AM
NewbimmerMD NewbimmerMD is offline
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Location: Washington, DC
 
Join Date: Oct 2010
Posts: 63
Mein Auto: 2011 Dark Graphite 535xi
Unusual engine sound

I have a 535xi and have noticed a rather loud mid pitched hum/buzz that emanates from the passenger side of the engine bay about midway in the area of the heat shield located there. Is not that noticeable with all the doors and windows closed while inside but is quite loud when standing outside the car with the engine running. Is not present when I start the car but something "turns on" as I drive and the noise develops. If I turn off the engine and restart it, the noise disappears. Thought it might be the AC compressor but it develops even if the AC is off. Had the dealer check it out and they stated it was a loose heat shield and tightened it but the noise persists. They car runs perfectly but I never really noticed the sound being this loud before. Has anybody else noticed this? Just wondering if this is normal ... sorry about the wall of text
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Old 09-30-2011, 09:15 AM
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TJPark01 TJPark01 is offline
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Location: Hollywood, CA
 
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Posts: 3,161
Mein Auto: E92 335i
Hard to know what you mean exactly. A video would really help.
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Old 09-30-2011, 10:50 AM
NewbimmerMD NewbimmerMD is offline
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Mein Auto: 2011 Dark Graphite 535xi
Thanks. I recorded the sound. WIll try and upload.
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