问：刹车踏板更换了所有4条制动线和垫子和卡尺后，直接伸到地板上

该制动系统具有抗锁（ABS）系统。该系统可防止在艰苦的制动事件中进行轮子锁定，以使道路上的轮胎接触区域且有效。当将空气引入制动系统时，它可能会被困在液压调制器中，该液压调制器是（ABS）系统的组成部分。

When there is brake bleeding in this system, a scan tool is required to activate the modulator’s brake channels to open and remove the trapped air. Another type of failure is themaster cylinder leakinginternally. Brake fluid over time degrades and can cause seals to fail. This fluid should be flushed as a maintenance item, depending on years of service. Since you shouldn’t be driving without working brakes, I recommend having a certified technician, such as one from YourMechanic, come to your car’s location toinspect your brake systemand let you know what repairs need to be made.