What is the purpose of electronic stability control (ESC)?

Over the years, automotive safety has improved considerably. Engineers and manufacturers have developed features such as airbags and anti-lock braking systems (ABS) to help drivers stay safe on the road. Another such innovation is electronic stability control (ESC). This article highlights the importance of this often-overlooked safety technology.

A tried-and-tested system
Even though you may not be familiar with the name, ESC has been a mandatory feature on all newly manufactured cars since 2012. This technology helps drivers maintain control of their vehicles when driving on slippery roads or during abrupt steering manoeuvres.

When your brakes are properly maintained and you follow all road signs, ESC becomes even more effective at preventing collisions and skids. It’s one of many features designed to enhance your safety on the road. In other words, it should not replace good driving habits—it should complement them.

How it works
Electronic stability control uses sensors that monitor factors such as steering wheel angle and vehicle trajectory, analyzing the risk of skidding in various driving situations. For example, if a driver needs to quickly maneuver around an obstacle, ESC will send a signal to the vehicle’s computer to apply the brake to an individual wheel, preventing the car from spinning out of control.

If the vehicle continues straight instead of rounding a curve—especially on icy roads—the system will apply the brake to one of the rear wheels or both front wheels, as needed. Whenever ESC is activated, it automatically reduces engine torque, even if the driver continues to press the gas pedal.

Consult your owner’s manual for more information. If your ESC system isn’t functioning properly, schedule an appointment at your nearest M 360 Mechanic.