If the wheels lock easily during emergency braking, it may be that the ABS system is broken, or the tires are too old. All cars have ABS systems. ABS system is an anti lock braking system, which can prevent the wheels from locking during emergency braking. If there is no ABS system, it is easy to lock the wheels during emergency braking. If the wheels are locked, the car will lose control and skid, which is very dangerous. So ABS system is very
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