Do I need new fasteners to install this?

Check your current hub bolts before installation. If they're in good shape, reuse them. If they're stripped, corroded, or damaged, you'll want fresh hardware. Specific bolt specifications are in your service manual.

Can I install this myself with basic tools?

Yes, but you'll need a socket set, a jack, and jack stands at minimum. Wheel removal and hub swap are straightforward on 4WD models. Take your time with bolt torque — refer to your manual for correct spec.

What if the assembly doesn't spin freely out of the box?

Light resistance is normal; bearings may have protective coating. Spin it by hand a few times. If it binds hard or makes noise, stop and contact support before installation.