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      02-12-2010, 04:04 PM   #6
Roowah
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Drives: 2006 E90 330i 6MT
Join Date: Jan 2007
Location: Cambridge, MA

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Quote:
Originally Posted by ShinyRedCar View Post
What's the benefit?
It's for aerodynamics. When driving at speed, the air becomes turbulent when it encounters the wheels. The flaps redirect the moving air around them. Our vehicles are quite aerodynamic underneath. That's one of the reasons we have so many plastic panels under there.
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2006 E90 330i 6MT: TiAg|Black Leather|Poplar Trim|Premium Package|Cold Weather Package
2003 E46 325i 5MT: Retired - The beginning of my BMW obsession!