Does this need any prep before installation?

Inspect the factory mounting surfaces on your axle for dirt and corrosion — clean them off before sliding the assembly on. The sensor connector should click in place once the hub is seated.

What fasteners do I need to bolt this down?

The assembly uses factory rocker bolts at the mounting points. Bring your own hardware to match your vehicle's specification — torque values are in your service manual.

Will the ABS warning light come on after install?

If the sensor connector is fully seated and the wiring harness is intact, the system should recognize it immediately. A lingering light usually means a loose connector or damaged harness on the vehicle side.