Bad wheel bearings and bad ball joints can feel similar, but they usually have different key symptoms. A failing wheel bearing often makes a steady humming, growling, or rumbling noise that gets louder with speed and may change when you turn the steering wheel slightly left or right. A bad ball joint more often causes clunking or knocking over bumps, loose or wandering steering, and sometimes uneven tire wear. A technician will typically raise the vehicle and check for play by spinning and rocking the wheel while watching the suspension parts. They can tell whether the movement comes from the bearing, the ball joint, or another component. Because these parts are critical for safety, testing and replacement are important.