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12-23-2009, 01:23 PM | #1 |
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Strange high pitched sound
Hi Guys-
So I have this really strange sound that i cannot for the life of me pinpoint. It basically sounds like a high pitched frequency that is typically heard when lightly accelerating from a stop or when coasting between 10 to 30 mph. It will typically last a couple seconds and come and go. It's faint enough that if you have stereo on you won't hear it. a couple other points: It never happens when stopped It happens regardless of stereo on it happens regardless of ac or heater on or off Anyone have this issue by chance? Anyway its bugging the shat out of me!!! It's going to the dealer next Monday so hopefully they can figure it out.... other than that I absolutely love the car. Cheers, Mark |
12-23-2009, 01:44 PM | #2 |
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i get it too. i think it has something to do with the turbos. im going to have it checked whenever it goes in for service.
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12-23-2009, 05:37 PM | #3 |
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I think what youre hearing is the "efficient dynamics". Behind your front kidney grill are two vents that open and close depending if the radiator needs cooling or not. Its supposed to reduce fuel consumption when they are closed. This is from BMW's website
Open to increased efficiency. A constant airflow through the radiator increases air resistance and affects aerodynamics. Electrically controlled vents in front of the radiator open and close the cooling air inlets so that the vents are only opened if cooling air is required. When the vents are closed, air resistance is reduced, as is fuel consumption |
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12-24-2009, 12:47 PM | #4 | |
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In my case I really don't think it has to do with the turbos. I'll keep you posted though to what my issues ends up being. Cheers, The Gooch |
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12-25-2009, 05:54 PM | #5 | |
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There are other features that where originally listed on the F01/F02 in regards to the efficient dynamics but they didn't make it onto the north American market!
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2009 750i individual | Citrin Black Metallic | Platinum Merino Extended Leather | BMW Individual Composition Package (includes Sport Package) | Dynamic Handling Package | Multimedia Package | Technology Package | Executive Package
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12-26-2009, 01:28 PM | #6 | |
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12-26-2009, 03:49 PM | #7 |
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When I picked up my car, there were no stickers on any windows
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2009 750i individual | Citrin Black Metallic | Platinum Merino Extended Leather | BMW Individual Composition Package (includes Sport Package) | Dynamic Handling Package | Multimedia Package | Technology Package | Executive Package
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12-27-2009, 04:06 PM | #8 | |
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My car had those as well
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