The anti-lock braking system (ABS) prevents skidding and loss of control under harsh braking. The Anti-lock braking system uses ABS Sensors that sense conditions in the wheel which could result in a skid. The rapid and accurate feedback from the Wheel Speed Sensor is vital to an effective Anti-lock Braking System. This is why every ELTA ABS Sensor is engineered to exacting standards and rigorously tested before being sealed into magnetically shielded packaging.