"CANNOT DUPLICATED THE PROBLEM" need all your opinion on this
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From: Boston, MA
My Ride: 2008 535i 6MT
To the OP, I'd check the cabin micro-filter housing at the back of the engine bay. It may be loose, have a bad seal, broken, or have a crack, hole in it. You could try running without the micro-filters installed to see if the noise increases or deceases.
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From: Livingston, New Jersey
I have a wind whistle noise that sounds like it's coming through my vent/dash. It first started at 130 mph+, but recently happened at 80+. I took it to the dealer and it couldn't be replicated. I went on M5Board and apparently this is an occassional problem with the windshields. Some aren't perfectly tight and you get a noise like wind is coming through the vents or the dash. Pinpointing it is difficult. The dealer agreed to replace the windshield for me.
Do you still experience the whistle noise after the windshield replaced?
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My Ride: 2008 Silverstone II E60 M5 2012 E70 AW X5 50i Sport w/ LCI Aero Kit and Rocker Panels
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From: Pittsburgh, PA USA
My Ride: G30 M550i
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I think C is on the right track with the windshield theory...
We've seen similar issues in the past -- here's just a small sample of threads on the subject:
https://5series.net/forums/topic/962...n-going-100mph
https://5series.net/forums/topic/444...-at-high-speed
https://5series.net/forums/topic/148...-at-80-140-mph
https://5series.net/forums/topic/109...le-over-100mph
We've seen similar issues in the past -- here's just a small sample of threads on the subject:
https://5series.net/forums/topic/962...n-going-100mph
https://5series.net/forums/topic/444...-at-high-speed
https://5series.net/forums/topic/148...-at-80-140-mph
https://5series.net/forums/topic/109...le-over-100mph
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From: NY
My Ride: 2008 Silverstone II E60 M5 2012 E70 AW X5 50i Sport w/ LCI Aero Kit and Rocker Panels
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From: Philly Burbs
My Ride: 08 550i, 6 Speed Manual w/Sport Pkg, Black
RPI Exhaust, Turner 15mm Rear Spacers, 20% Tint
It's a vibration Metal/Metal from one of your exhaust components. Rpm's & heat will change the clearance quite a bit. Have your exhaust system looked at carefully. Check all clearances. Heat causes expansion and if something is very close cold, it's going to touch hot. High Rpm's can twist the drive train on the tranny / engine mounts as well.
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From: Pearland, Texas
My Ride: 530I Silver gray with gray leather with Premium Package, Logic 7 Premium sound system with Ipod interface, xenon adaptive headlights, Active steering, Power retractable rear sunshade, Comfort seats, Cold weather package and M5 OEM 166 wheels, Sprintbooster. Ceramic Tint all around, Bilstein Sports shocks with Eibach springs, Brake performance Rotors and Axxis ceramic pads.
My cousin 335XI have a similar whistling sound at high speed. As it turned out the windshield was not properly sealed. Resealed the windshield and this solved the problem.