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      06-06-2020, 05:38 AM   #2
Setright
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Drives: 120d M-Sport 2018
Join Date: Mar 2016
Location: Denmark

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The air flow is channeled through a central box, with piping leading to the respective outputs. There are flaps and shutters that control the directions. These usually have a foam edge to seal well, and these could be worn-out. I haven't take any newer BMW apart, so these are educated guesses.

It may just be that the flaps/shutters never were made to seal 100%.

Either way, it is usually a time-consuming job to remove the central box...
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