Hearing a humming, grinding, or roaring noise from the front of your BMW? It might be time for a new wheel hub and bearing. This SCITOO kit gives you TWO complete front hub assemblies, so you can do both sides at once (which is often recommended). These are direct replacements for OEM part number 513359 (also 31206867256) and they come with the ABS sensor already built-in, so you don't have to mess with separate parts. They're made to precise specifications and tested for compatibility with your BMW's ABS system. They fit a ton of models from 2012 to 2016, including the 228i, 320i, 328i/d, 335i, 340i, 428i, and 435i (check the full list to confirm your exact model and year!). The design helps reduce noise and vibration, has good seals to keep out dirt and water, and the bolts have a protective coating. A quality, reliable replacement that will get your BMW driving smoothly and quietly again. Great for DIYers or to bring to your trusted mechanic.