ECCPP 513179 Front Premium Grade 5 Lugs ABS Left & Right Wheel Hub and Bearing Assembly (513179 x2) Rigorously controlled manufacturing processes ensure exact matching of bearing raceways and rolling elements Includes ABS sensor cord Designed to maximize the performance of the related components in the ABS and steering system Precise engineering ensures easy installation Made of high-quality material Rotate the wheel by hand and experience noise or roughness The temperate of the hub is warm after 10-15 minutes of drive Have a play (The wiggle room) in your wheel A: Though you may never even see it, an auto wheel bearing unit is an important part of your cars wheel assembly, enabling your wheels to turn freely and playing a crucial role in the safety and handling characteristics of your vehicle. Comprised of precision manufactured bearings, seals and sensors in one preassembled unit, a wheel hub bearing unit is critical to your cars performance, from the smoothness of the ride, to fuel efficiency, to the integrity of your anti-lock breaking system (ABS). So when its time to replace one, youll want a replacement hub bearing thats as good  and safe  as the original that came with your car when it was new. A: Every ECCPP auto wheel bearing is 100% tested, that means it will fit correctly and work correctly, and last as long as the original hub that came with the car when it was new.