Wheel bearings should be replaced when they become worn or damaged. There is no set mileage for replacement, as it can vary depending on driving conditions and usage. Mechanics can inspect the bearings during routine maintenance to identify any signs of wear or damage and recommend replacement if necessary.

Signs of a worn wheel bearing can include noise, such as grinding or humming, coming from the wheel or hub assembly, vibration or wobbling, uneven tire wear, and reduced handling or steering response. If any of these signs are present, it’s important to have the bearings inspected by a professional mechanic as soon as possible.

Yes, wheel bearings can be lubricated to ensure they rotate smoothly and avoid damage from dirt and debris. Mechanics can clean and lubricate the bearings during routine maintenance to help prolong their lifespan and avoid premature wear.

Yes, a worn or damaged wheel bearing can cause other problems with the vehicle’s suspension and handling. It can affect steering response, cause uneven tire wear, and even lead to loss of control of the vehicle in extreme cases.

Replacing wheel bearings requires specialized tools and knowledge, and it’s typically best left to professional mechanics. Attempting to replace wheel bearings at home can be dangerous and can lead to further damage to the vehicle’s suspension system.