Vehicle Stability Assist (VSA) is a system designed to prevent sideways skidding (ลื่น) when cornering, thus complementing ABS (which prevents wheel lockup) to help ensure vehicle stability in most driving conditions - going, turning, and stopping.
Should the car deviate from its correct path, VSA activates to bring the car back on track.
Vehicle Stability Assist (or Electronic Stability Control) is designed to anticipate when the car is being driven either deliberately or inadvertently in such a way that a loss of front or rear tyre grip is about to occur.
During cornering, VSA determines if the car is deviating from its correct path.
The system monitors the speed of the car as well as the relative speed of each wheel, the amount of turn on the steering wheel and the yaw and lateral G-forces on the vehicle. Should the car deviate from its correct path, VSA activates to bring the car back on track by applying the brakes to any individual wheel or adjusting the engine output.