Sunroof flutter noise?

[ChiX5M]

When the sunroof is all the way open and I put my foot down on the gas, the sunroof makes this crazy flutter noise like something is loose.

Anyone else? How is this fixed?

[gblansten]

Is it the net thing at the start of the opening? I haven't noticed a noise so far.

[Djvolume]

There is two positions to the roof the first when it opens half way, and with that there is no sound and the second where it opens all the way, where you get that sound, unfortunately there is no fix for that it's just the aerodynamic of the interior that created that wobbling sound. That one reason one the sunroof was designed to be opened first to the half position.

[trev230]

I have it too. Sometimes it does it when it's fully closed as well.

[Winn]

There are two drain ports for the sunroof in the back hatch on the top with flaps that cover them. If the sunroof is open and you accelerate quickly, they'll flap open causing the sound you hear until you close the roof or stop. Some people have suggested taping them to add weight...I just took them off. No more sound.

[Hammmerhead]

I had it happen after a stiff launch and thought I lunched the rear end.

[Mahmood07]

Originally Posted by Winn

There are two drain ports for the sunroof in the back hatch on the top with flaps that cover them. If the sunroof is open and you accelerate quickly, they'll flap open causing the sound you hear until you close the roof or stop. Some people have suggested taping them to add weight...I just took them off. No more sound.

Any chance you have photos of these flaps?

[Winn]

Originally Posted by Mahmood07

Any chance you have photos of these flaps?

Here's a pic I found of the hatch online (it's for an E70 model, but it looks the same). Highlighted in yellow are the two ports.

[Kzang]

Are we talking about the air pressure build up in the cabin which makes the sound on almost every SUV's out there due to the nature of the design...

or are we talking about this?

This is a very common issue with the X5 and experienced with many F15 owners myself included.

Here is a thread on the subject from another forum. http://www.bimmerfest.com/forums/sho...d.php?t=849722

[Djvolume]

Originally Posted by Kzang

Are we talking about the air pressure build up in the cabin which makes the sound on almost every SUV's out there due to the nature of the design...

or are we talking about this?

This is a very common issue with the X5 and experienced with many F15 owners myself included.

Here is a thread on the subject from another forum. http://www.bimmerfest.com/forums/sho...d.php?t=849722

Wow

[Mahmood07]

Originally Posted by Winn

Here's a pic I found of the hatch online (it's for an E70 model, but it looks the same). Highlighted in yellow are the two ports.

Thank you! I took them off and so far no fluttering noise. I'll push it hard with sunroof open today and see how it goes.

Originally Posted by Kzang

Are we talking about the air pressure build up in the cabin which makes the sound on almost every SUV's out there due to the nature of the design...

or are we talking about this?

This is a very common issue with the X5 and experienced with many F15 owners myself included.

Here is a thread on the subject from another forum. http://www.bimmerfest.com/forums/sho...d.php?t=849722

Yes that's the sound I am talking about.

[BMWadrenaline]

Yea just take the flaps off, had mine off for over a year and no issues, took the dealership several days to track down the noise.

[onfireX5]

Originally Posted by Kzang

Are we talking about the air pressure build up in the cabin which makes the sound on almost every SUV's out there due to the nature of the design...

or are we talking about this?

This is a very common issue with the X5 and experienced with many F15 owners myself included.

Here is a thread on the subject from another forum. http://www.bimmerfest.com/forums/sho...d.php?t=849722

Nasty

[trev230]

That's exactly what mine does as well

[mcvaughan]

Had the same fluttering on my F15 -- only when fully open.