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How do hub bearings affect braking safety?

 

Hub bearings include the wheel speed sensor that controls the anti-lock braking system (ABS). This sensor sends a constant signal to the ABS control system, telling it how fast each wheel is turning. In an emergency situation, the ABS control system will determine if anti-lock braking is required.

If the ABS sensor doesn’t work properly or fails, the ABS system fails, so the quality of this sensor (how it is made and protected from damage) is critical to braking safety.