回复：刹车（尤其是急刹车）时方向盘颤抖是怎么回事？ABS有问题？

It may have nothing to do with ABS. Typically it is caused by the front disk rotor wobble.

Have the rotors turned for less than $10 each, or replaced for several hundred bucks, depending on the remaining thickness of the rotor, and how hungry the repairshop is for cash.