In ABS/vdc actuators with more than one ball, it is possible that fluid flow could be blocked and cause a reduction in brake force in one or both front wheels or affect operation of the ABS and/or vdc. This could result in a reduction in brake effectiveness without warning increasing the risk of a crash.
Service Brakes, Hydraulic — Antilock — Control Unit/Module
On certain sport utility vehicles, the antilock brake system/vehicle dynamic control (ABS/vdc) actuator is designed with one ball in the valve section. Some ABS/vdc actuators were manufactured with more than one ball in the valve.