Bimmerfest - BMW Forums

Bimmerfest - BMW Forums (http://www.bimmerfest.com/forums/index.php)
-   7 Series - F01 (2009 - current) (http://www.bimmerfest.com/forums/forumdisplay.php?f=143)
-   -   Why is the sunroof so LOUD???? (http://www.bimmerfest.com/forums/showthread.php?t=674818)

Emilner 02-06-2013 06:59 PM

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??

dbs600 02-06-2013 07:14 PM

Yes; it's loud!

Tuesday 02-07-2013 12:26 AM

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.

dbs600 02-07-2013 08:30 AM

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.

chrischeung 02-07-2013 11:16 AM

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.

dbs600 02-07-2013 12:06 PM

It's a wind deflector, so the wind doesn't rush into the cabin...

Individual750LI 02-07-2013 12:14 PM

I never opened my sunroof, I like isolated cabin. :)

AdamG13 02-07-2013 12:26 PM

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.

Tuesday 02-07-2013 01:05 PM

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 (Post 7365671)
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.


Emilner 02-07-2013 06:49 PM

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....

chrischeung 02-08-2013 09:11 AM

Well - at least it's fine when you're parked :).

dbs600 02-08-2013 09:45 AM

Quote:

Originally Posted by AdamG13 (Post 7366260)
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?

AdamG13 02-08-2013 11:46 AM

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.

dbs600 02-08-2013 01:06 PM

Hmm... okay; thanks!

dbs600 07-23-2013 08:32 PM

Anyone figure out a way to program the deflector it's always lowered to the 55+ MPG height?

Emilner 07-24-2013 10:29 AM

Quote:

Originally Posted by dbs600 (Post 7728862)
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!!:rofl:

light1 07-24-2013 01:09 PM

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!

dbs600 07-24-2013 06:25 PM

Quote:

Originally Posted by Emilner (Post 7729920)
How low does it need to go to get to 55mpg??? I'd like to program that as well!!:rofl:

Ha Ha! FUNNY typo!

KingTrack 07-24-2013 07:01 PM

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.

Rick in Yuma 07-25-2013 05:11 AM

Why has this type deflector not been mentioned. Looks? Anyone tried one ?

http://www.autoanything.com/deflecto...FWfhQgodPSEAmw

Emilner 07-25-2013 06:00 AM

Quote:

Originally Posted by Rick in Yuma (Post 7731585)
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....

DLF750 07-25-2013 06:37 PM

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.

ImolaMMM 01-13-2014 09:47 AM

BUMP

Ok, so I'm coming up on a week w/the car & the noise is ridiculous!!!:mad:
Between the noise from the sunroof & the run flats...:tsk:

Leftlane11 01-13-2014 03:23 PM

Horrible design - glad I'm not the only one who thinks it makes the sunroof completely unusable.

DLF750 01-13-2014 05:06 PM

I don't notice it honestly. I always have my sunroof open, even in the winter.


All times are GMT -7. The time now is 11:54 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms