Do I need fasteners beyond what comes in the box?

The kit itself is the assembly. You'll need the original bolts from your vehicle—they reuse the factory fastening points. Keep your OEM hardware.

Can I reuse the brake rotor and caliper with this new hub?

Yes. The new hub accepts your existing rotor and caliper brackets at the same mounting positions. No brake work required unless your rotors or pads are worn.

How do I know if this is a front or rear replacement?

Your parts diagram or service manual lists the correct position. If you're unsure which hub failed, have a tech inspect before ordering—front and rear units are position-specific and not interchangeable.