Wheel Speed Sensor Failure 

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A call we often get on our technical hotline revolves around the ABS light coming on after a hub bearing replacement. In this video, we talk about how to avoid this problem when installing a hub bearing.
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When the ABS light comes on after a hub bearing replacement, the issue is most likely due to the wheel speed sensor. When taking the old hub off the car, make sure to take a note of where the sensor is routed. Make sure to install the hub the same way it was installed previously. Also, make sure to use the brackets provided to route the sensor correctly. If you install the hub or the sensor incorrectly, the sensor will most likely get pinched. This will trigger the ABS light.