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7 Series - F01 / F02 (2009 - current)
The new re-designed 7 series F01 / F02 leads off the BMW Fxx chassis code!

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  #1  
Old 02-06-2013, 07:59 PM
Emilner Emilner is offline
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Why is the sunroof so LOUD????

I cannot get over how freeking loud the wind deflector on the sunroof is. I'm talking about the mesh screen that is attached to the factory windscreen that pops up when you open the roof all the way. It is so loud you can't use the sunroof over 40mph. And it's not just my car- I asked 2 friends with 2012 750IL's and they said the same thing- they can't use the sunroof because it sounds ridiculous. If you reach up and manually pull the deflector down the noise disappears. Anyone else experience this, or had it fixed??
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  #2  
Old 02-06-2013, 08:14 PM
dbs600 dbs600 is offline
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Yes; it's loud!
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  #3  
Old 02-07-2013, 01:26 AM
Tuesday Tuesday is offline
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Have you ever noticed that over ~80mph the deflector actually lowers itself a bit?

I agree that it's a bad design - but the weather here is too great to let it stop me from opening it.
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  #4  
Old 02-07-2013, 09:30 AM
dbs600 dbs600 is offline
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Does it lower due to resistance or programming?

If programming, maybe it can be programmed to a different height all together, finding the right balance of noise to deflectionů.
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  #5  
Old 02-07-2013, 12:16 PM
chrischeung chrischeung is offline
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What is the effect with the shield up? Does it reduce drag and turbulence for backseat pax? A safety device. There has to be a reason for it to be there.
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  #6  
Old 02-07-2013, 01:06 PM
dbs600 dbs600 is offline
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It's a wind deflector, so the wind doesn't rush into the cabin...
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  #7  
Old 02-07-2013, 01:14 PM
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I never opened my sunroof, I like isolated cabin.
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  #8  
Old 02-07-2013, 01:26 PM
AdamG13 AdamG13 is offline
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The thing is that it's a diffuser and not a deflector. I had a deflector in my last 7, and it was much quieter. Not sure about the back passengers, because they're not allowed to complain, but the front compartment doesn't experience any less turbulence in my F01 than it did from the sunroof in my E65. Sometimes I just keep the sunroof open around 70% so that the diffuser doesn't engage. That damn thing is loud enough to drive a sane man over the edge. Maybe those Germans added it in to cover the noise of that garbage stereo they sold us for an extra $1800.
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  #9  
Old 02-07-2013, 02:05 PM
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It lowers because of programming - once you slow down from a high speed it doesn't pop back up until you hit +/-55mph.

That's a brilliant thought - when I get my car out of the shop I will look at the parameters in the sunroof module and see if anything can be changed regarding diffuser height.



Quote:
Originally Posted by dbs600 View Post
Does it lower due to resistance or programming?

If programming, maybe it can be programmed to a different height all together, finding the right balance of noise to deflectionů.
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  #10  
Old 02-07-2013, 07:49 PM
Emilner Emilner is offline
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Ok, at least I'm not the only one!!

The problem lies with the mesh- I'm thinking of cutting it out to see if it improves the sound. I can't believe you can buy a $100,000 car that has a useless sunroof....
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  #11  
Old 02-08-2013, 10:11 AM
chrischeung chrischeung is offline
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Well - at least it's fine when you're parked .
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  #12  
Old 02-08-2013, 10:45 AM
dbs600 dbs600 is offline
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Quote:
Originally Posted by AdamG13 View Post
The thing is that it's a diffuser and not a deflector.
Learn something every day! What's the difference between a diffuser and a deflector? The former is mesh and allows [some] air (sound) to pass, while the latter is solid and completely redirects? If so, thoughts on why they opted for a diffuser this time around?

Last edited by dbs600; 02-08-2013 at 10:46 AM.
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  #13  
Old 02-08-2013, 12:46 PM
AdamG13 AdamG13 is offline
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I'd think the deflector (was a solid black piece of metal in my E65) would be designed to carry the wind stream over the roof opening, but maybe they found that it was just directing it into the face of rear passengers. The diffuser is meant to just break the wind up - sort of like those rear wind screens that some convertibles have. I had some type of chevrolet as a rental car a while ago (i think it was an impala), and it had some loud diffuser also. I wouldn't imagine BMW would use them because they're cheaper than a piece of solid metal, but who knows with these guys.
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  #14  
Old 02-08-2013, 02:06 PM
dbs600 dbs600 is offline
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Hmm... okay; thanks!
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  #15  
Old 07-23-2013, 09:32 PM
dbs600 dbs600 is offline
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Anyone figure out a way to program the deflector it's always lowered to the 55+ MPG height?

Last edited by dbs600; 07-24-2013 at 07:25 PM.
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  #16  
Old 07-24-2013, 11:29 AM
Emilner Emilner is offline
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Quote:
Originally Posted by dbs600 View Post
Anyone figure out a way to program the deflector it's always lowered to the 55+ MPG height?
How low does it need to go to get to 55mpg??? I'd like to program that as well!!
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  #17  
Old 07-24-2013, 02:09 PM
light1 light1 is offline
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yeah i noticed this was very annoying, i actually puled it down with my hand a few times and thought to myself it was broken, guess not. DAmn noisy!
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  #18  
Old 07-24-2013, 07:25 PM
dbs600 dbs600 is offline
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Quote:
Originally Posted by Emilner View Post
How low does it need to go to get to 55mpg??? I'd like to program that as well!!
Ha Ha! FUNNY typo!

Last edited by dbs600; 07-24-2013 at 07:26 PM.
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  #19  
Old 07-24-2013, 08:01 PM
KingTrack KingTrack is offline
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I dont think its any more noisy than when you pull it down as far as actual loudness, with it up its just a bit higher sound as far as pitch so easier to hear but even with it down its still just as loud to me lol.
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  #20  
Old 07-25-2013, 06:11 AM
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Rick in Yuma Rick in Yuma is online now
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Why has this type deflector not been mentioned. Looks? Anyone tried one ?

http://www.autoanything.com/deflecto...FWfhQgodPSEAmw
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  #21  
Old 07-25-2013, 07:00 AM
Emilner Emilner is offline
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Quote:
Originally Posted by Rick in Yuma View Post
Why has this type deflector not been mentioned. Looks? Anyone tried one ?

http://www.autoanything.com/deflecto...FWfhQgodPSEAmw
I just can't see those on a BMW, or any luxury car for that matter. It's like rain window guards- they belong more on a Maxima....
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  #22  
Old 07-25-2013, 07:37 PM
DLF750 DLF750 is offline
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I thought you guys were nuts for talking about how the diffuser drops at certain speeds etc. There's no way! But then, when I left the sunroof open when I shut off the car, it lowered! Couldn't figure out what that noise was. Shut if off a few times and actually saw it drop down.
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  #23  
Old 01-13-2014, 10:47 AM
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ImolaMMM ImolaMMM is offline
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BUMP

Ok, so I'm coming up on a week w/the car & the noise is ridiculous!!!
Between the noise from the sunroof & the run flats...
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  #24  
Old 01-13-2014, 04:23 PM
Leftlane11 Leftlane11 is offline
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Horrible design - glad I'm not the only one who thinks it makes the sunroof completely unusable.
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  #25  
Old 01-13-2014, 06:06 PM
DLF750 DLF750 is offline
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I don't notice it honestly. I always have my sunroof open, even in the winter.
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