Wheel bearings may need replacing for a number of different reasons. On some vehicles, when removing the front axles, the wheel bearings need to be replaced before reinstallation. If the wheel spins with a gritty feel or there is a loud metal to metal noise when on the road, your bearings have failed. Wheel bearings on modern vehicles generally need to be pressed in. If that is the case with your vehicle, specialist tools such as a shop press may be required to install this bearing. Please check what is required to make your wheel bearing before ordering. Fits either left or right side. Installation note: The red sealing ring must face outwards, otherwise the ABS function is not ensured by the pulse generator built into the bearing.