A wheel bearing is a crucial component in vehicles that allows the wheels to rotate smoothly. It consists of a set of steel balls or rollers encased in a metal ring, which reduces friction between the wheel and the axle. Proper functioning of the wheel bearing ensures stability and safety while driving. Over time, wheel bearings can wear out due to constant use and exposure to dirt and moisture. Signs of a failing wheel bearing include unusual noises, vibrations, or uneven tire wear. Regular maintenance and timely replacement are essential to keep the vehicle operating safely and efficiently.