Does this come with a bulb, or do I need to source one separately?

Bulb is not included with this assembly. You'll need to source the correct bulb type for your vehicle separately and install it into the socket provided on the back of the headlight unit.

Will I need any brackets or fasteners beyond what's on the vehicle, or does it bolt straight into the factory mounting points?

This assembly mounts at factory points — no additional brackets required. Use the existing hardware on your vehicle to secure it in place.

What's the return process if the headlight doesn't fit or work correctly when it arrives?

Test-fit and inspect the assembly immediately upon arrival. Contact customer service with photos if there's a fitment issue or defect. Warranty and return eligibility depend on condition at arrival and will be evaluated on a case-by-case basis.