What Causes the Abnormal Noise from the Left Front Wheel of a Sedan?

[Mitchell]

The abnormal noise from the left front wheel of a sedan can be divided into two scenarios: low-speed noise and high-speed noise, which are caused by inaccurate four-wheel alignment or damaged wheel bearings. Below are the specific reasons: Inaccurate Four-Wheel Alignment: At low speeds, a rhythmic humming noise occurs, which diminishes at high speeds. Cause: Inaccurate four-wheel alignment leads to uneven tire wear during long-distance driving, resulting in abnormal noise. Solution: Feel the tire treads with your hand. If you notice uneven wear on the inner or outer treads, this is likely the cause of the noise. First, perform a four-wheel alignment and then replace the tires. Damaged Wheel Bearing: The noise is not noticeable at low speeds but produces a uniform humming sound at high speeds. Cause: This phenomenon occurs when a wheel bearing is damaged. Long-distance driving places high demands on wheel bearings, and bearings of poor quality or those that have been in use for a long time may fatigue and become damaged, causing abnormal noise. Solution: Visit a service station to diagnose the source of the noise, identify the problematic wheel, and replace the bearing.