2021 BMW 4-Series 420i 430i Sprint Function and Engines
Tweet on Twitter Share on Facebook PinterestThe new package is in addition to all the M bits that come on the standard M Sport model. The Pro gets the eight-speed Steptronic Sport transmission with the Sprint function, available in Sport mode, that allows for short bursts of speed and more pronounced engine sounds in the cabin. It also includes M Sport brakes, M seatbelts, and a Harman Kardon sound system.
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