The front wheel bearings, along with the hubs, are important parts of your vehicle’s steering, suspension, and braking systems. Most modern vehicles use a one-piece wheel hub bearing assembly that contains the hub, wheel bearing, ABS wheel speed sensor, and mounting flange.
Most serviceable wheel bearings need maintenance every 40,000 to 48,000 kilometers, or during every brake service. But, the average life of a sealed wheel bearing and hub assembly is about 137,000 to 160,000 kilometers.
Indicators of a worn wheel hub bearing or other wheel-end damage can be identified with some or all of the following symptoms such as grinding when the vehicle is in motion, Knocking or clunking, Humming, rumbling or growling, Wheel vibration and/or wobble, Abnormal side pull when brakes are applied, and Uneven rotor or brake pad wear. Wheel bearings will receive all the pressure of the tire and wheel. If you were to drive over a bumpy curb or pothole, the wheel bearing could be subjected to damage very easily. … Soon the wear will cause debris to form and this will pollute the lubricant of the wheel bearing and make it fail a lot faster
