Do I need to replace the brake rotor and pads when I install this knuckle?

The rotor and pads are separate components that you'll handle independently. Since the caliper bracket is already mounted to this assembly, you can slide your rotor onto the spindle and bolt the caliper in place once everything is seated.

Will the wheel bearing need to be adjusted or packed after installation?

This assembly ships with the bearing installed and seated. Once the knuckle is bolted to the control arms and axle, your brake and suspension geometry will be correct—refer to your vehicle's service manual for final torque specs on control arm fasteners.

What if the knuckle arrives damaged or doesn't sit right after I bolt it in?

Inspect the assembly before installation, especially the wheel bearing bore and brake backing plate mounting surface. If alignment issues occur after install, double-check control arm bolt torque and wheel bearing preload against your service manual—misalignment usually traces back to fastener tension, not the part itself.