Quote:
Originally Posted by BavarianFanatic
It's very interesting that the mirror design has been tweaked. The extra spoilers serve no other purpose than to break up the air flow between the mirror body and the door.
Aerodynamics is a very complicated science. The mere fact that air is being forced between the two fixed surfaces (mirror and body) means that it's being compressed and accelerated. This alone will generate noise. Taping gaps and sealing joints won't make any difference. It's also important to understand that there's a multitude of different things that can cause noise and, because it's so subjective, different folks might be hearing different things but can easily relate to someone else and think their situation is similar/the same.
To test the mirror on an "old design" mirror, try attaching something that will have an effect similar to what you see in the photos. Even just some tape that you've rolled/folded onto itself to create a crease or ridge should make a difference.
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I'm afraid you got it wrong. The one with LESS ridges is a NEWER design. And it doesn't seem to make any difference - the noise is way too massive to be influenced by a couple of minor dimples.