VIDEO: 2021 BMW 4-Series 420i 430i Sprint Function and Engines

The new package complements all the M-bits found on the standard M Sport model. The Pro has an eight-speed Steptronic Sport gearbox with Sprint function, available in Sport mode, allowing for short acceleration acceleration and clearer engine sound in the cabin. It also includes M Sport brakes, M seat belts and a Harman Kardon sound system.

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