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X5 E70 (2007 - 2013)
E70 BMW X5 produced between 2007 and 2013. Discuss the E70 X5 with other BMW owners here.

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Old 09-03-2012, 08:27 PM
blueskyz089 blueskyz089 is offline
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Location: USA
Join Date: Jun 2011
Posts: 71
Mein Auto: 2011 X5 35i
Help!!...need your input on what might be the the cause.

I have a 2011 X5 35i, I have realized my car was making a high pitch sound when accelerating for a while already, but today I just got back from a trip to big bear lake, and found out that it seems to be louder then before.

Does anyone know what could be the cause? I know I am not giving enough info here but I really can't describe the sound, its like an old fans whining sound? The sound only appear when the car is in "D" and accelerating, when I put the car in "P" it wont make that sound.

Sent from my HTC Sensation XE with Beats Audio using Bimmer App
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Old 09-03-2012, 09:03 PM
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gresch gresch is offline
Don't be a hammer
Location: NY/NJ/LI
Join Date: May 2005
Posts: 264
Mein Auto: '12 X5 35d
check belts
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Old 09-03-2012, 09:29 PM
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serge1 serge1 is offline
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Location: seattle
Join Date: Jan 2012
Posts: 1,101
Mein Auto: 2011 BMW X5 35D
That's turbo, man! Just kidding, I dont know...
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Old 09-04-2012, 07:15 AM
Redskin Redskin is offline
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Location: Australia
Join Date: Jun 2005
Posts: 78
Mein Auto: 528i
Could be a fan belt idler pulley.
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