Do I need new bolts or mounting hardware?

You'll use your existing wheel hub bolts—they transfer from the old hub to this new assembly. Check them for corrosion or damage before install; if they're seized or stripped, grab replacements before you start.

Can I repack or service the bearing myself?

No. This bearing is sealed and pressed into the hub. If it fails later, you replace the entire unit—you can't open it up to clean or repack it.

What if the new hub doesn't line up with my brake rotor or wheel?

Test-fit immediately after bolting it on. If runout is off, verify the old hub wasn't damaged and compare mounting surfaces on both units. Runout issues usually mean the old suspension attachment point or spindle needs inspection.