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BMW have apparently continued to enhance the interior/perceived sound of their cars. They did to the M135i what they did to the F10M: the ActiveSound in-cabin sound generation. The video to the left shows the car with the system off, here is what it sounds like with the help of electronics.

BMW have apparently continued enhancing the interior/perceived sound of their cars. They did to the M135i what they did to the F10M: the ActiveSound in-cabin sound generation. The video to the left shows the car with the system off, here is what it sounds like with the help of electronics.