Dynamic Stability Control (DSC) is the technology that BMW models with xDrive use to stop wheels spinning once they lose grip. For example, in the BMW X1, if mud causes a wheel to spin it’s detected in a fraction of a second and the brakes applied to it to limit spinning.
The system is also triggered by understeer or oversteer, even before wheels start to spin – if sensors detect that the car is not going where the driver is steering, individual wheels are braked to allow the driver to regain control. This happens in a fraction of a second, and often without the driver being aware that the system has intervened.
It’s important to note that DSC doesn’t give better cornering, but is instead a safety mechanism, helping the driver to regain control in tricky situations.