2015 BMW M3, M4: 10 Things You Need to Know

2. Active M Differential

Using an electronically controlled multi-plate limited-slip differential, the Active M Differential optimizes traction and directional stability. The control unit links up with the Dynamic Stability Control (DSC) system that takes into account the position of the accelerator pedal, the rotational speed of the wheels and the car’s yaw rate. In addition, the M Dynamic Mode, which is a sub function of the DSC system, allows greater wheel slip and easier drifting.