PSM is an automatic control system for providing stability at the limits of dynamic driving performance. In addition to the anti-lock braking system, it includes Electronic Stability Control (ESC) and Traction Control (TC).
Sensors continuously monitor the direction, speed, yaw velocity and lateral acceleration of the car. Using this information, PSM is able to calculate the actual direction of travel at any given moment. If the car begins to oversteer or understeer, PSM applies selective braking on individual wheels to restore stability.
What’s special about PSM in the new 911 GT3? The systems intervene at the limits of dynamic driving performance with exceptional sensitivity and precision. In addition, the systems can be completely deactivated in two stages for deliberately sporty handling.