CF mirror cap wind noise!!

shane060 · 09-05-2015, 05:14 PM

Anyone else having issues with a annoying screech or wind noise coming from the drivers side CF Mirror caps? I am getting a horrible noise and wanted to see if anyone had the same issue or solution for a fix?!

isthar · 09-05-2015, 07:12 PM

what speeds? I used to/sometimes get something at around 38-40mph but I confess...have not heard it in a long time... what's changed? nothing... washes, fold em in/out... push on it a bit...

shane060 · 09-06-2015, 01:21 AM

about the same 35-45mph high pitched but highway its just a bad wind noise like almost a Leak in the window but Ive verified its the damn cap.... I ran a piece of tape along the top just for the hell of it and bam noise stopped completely, problem is I don't want TAPE on my damn mirror cover....

NEUE02 · 09-06-2015, 03:00 AM

Remove and reinstall. Sometimes it will go away. You can also run the tiniest pit of clear RTV sealant into the crevice to seal it from leaking air to the inside of the cap (which makes a literal whistle) and it will eliminate the notice and be virtually invisible.

shane060 · 09-07-2015, 09:16 PM

Any specific areas to put the sealant? Im going to remove but I worry about breaking the OEM CF caps it feels like something is gonna break.

DanG · 09-07-2015, 11:38 PM

I have no problems but I also bought the M Performance caps.

Taunto · 09-19-2015, 11:09 PM

I am not familiar with these caps to be honest. Idk if the caps your talking about are a stick on cover or if they actually replace the factory mirror cover.

We do at BMW get some complaints about wind noise from customers coming from the mirror area. Some have been related to gap issues or damaged components, But most are from having 3m placed on them. If your cap is installed correctly and u have 3m over it... try taking some painting tape and placing it over the edges of the 3m on the mirror...then drive to the speeds u heard the noise at.... once their reach out and try to slowly peel strips of tape off one at a time until the noise comes back....then u will know where its coming from...

If this is not ur case... disregard everything i said lol. Just trying to help :P

09-05-2015, 05:14 PM	#1
shane060 Second Lieutenant 89 Rep 229 Posts Drives: 2015 M235 6spd 2011 M3 DCT Join Date: Nov 2009 Location: SA TX iTrader: (1) Garage List 2011 M3 [0.00]	CF mirror cap wind noise!! Anyone else having issues with a annoying screech or wind noise coming from the drivers side CF Mirror caps? I am getting a horrible noise and wanted to see if anyone had the same issue or solution for a fix?!
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09-05-2015, 07:12 PM	#2
isthar Second Lieutenant 60 Rep 273 Posts Drives: M235i xDrive Join Date: May 2015 Location: Boston, USA iTrader: (0)	what speeds? I used to/sometimes get something at around 38-40mph but I confess...have not heard it in a long time... what's changed? nothing... washes, fold em in/out... push on it a bit... __________________ //M235ix Alpine White
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09-06-2015, 01:21 AM	#3
shane060 Second Lieutenant 89 Rep 229 Posts Drives: 2015 M235 6spd 2011 M3 DCT Join Date: Nov 2009 Location: SA TX iTrader: (1) Garage List 2011 M3 [0.00]	about the same 35-45mph high pitched but highway its just a bad wind noise like almost a Leak in the window but Ive verified its the damn cap.... I ran a piece of tape along the top just for the hell of it and bam noise stopped completely, problem is I don't want TAPE on my damn mirror cover....
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09-06-2015, 03:00 AM	#4
NEUE02 Lieutenant 267 Rep 554 Posts Drives: M235i Join Date: Dec 2014 Location: St Louis iTrader: (0)	Remove and reinstall. Sometimes it will go away. You can also run the tiniest pit of clear RTV sealant into the crevice to seal it from leaking air to the inside of the cap (which makes a literal whistle) and it will eliminate the notice and be virtually invisible. __________________ The Stable 2015 BMW M235i \| 2014 Porsche Carrera S \| 2017 Porsche Macan GTS \| 1996 Porsche Carrera 4S
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09-07-2015, 09:16 PM	#5
shane060 Second Lieutenant 89 Rep 229 Posts Drives: 2015 M235 6spd 2011 M3 DCT Join Date: Nov 2009 Location: SA TX iTrader: (1) Garage List 2011 M3 [0.00]	Any specific areas to put the sealant? Im going to remove but I worry about breaking the OEM CF caps it feels like something is gonna break.
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09-07-2015, 11:38 PM	#6
DanG Major General 10661 Rep 6,937 Posts Drives: 2018 M2 AW DCT Join Date: Aug 2012 Location: Seattle, WA iTrader: (1) Garage List 2018 BMW M2 [7.68]	I have no problems but I also bought the M Performance caps.
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09-19-2015, 11:09 PM	#7
Taunto Car Enthusiast 282 Rep 501 Posts Drives: 2016 BMW M235 X-drive Join Date: Apr 2011 Location: Regina iTrader: (0)	I am not familiar with these caps to be honest. Idk if the caps your talking about are a stick on cover or if they actually replace the factory mirror cover. We do at BMW get some complaints about wind noise from customers coming from the mirror area. Some have been related to gap issues or damaged components, But most are from having 3m placed on them. If your cap is installed correctly and u have 3m over it... try taking some painting tape and placing it over the edges of the 3m on the mirror...then drive to the speeds u heard the noise at.... once their reach out and try to slowly peel strips of tape off one at a time until the noise comes back....then u will know where its coming from... If this is not ur case... disregard everything i said lol. Just trying to help :P
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