Will this bolt directly into the factory mounting points?

Yes. This is a direct OEM replacement — it uses the same mounting location and hardware configuration as the original tail light.

Does the bulb come installed?

The assembly arrives complete. Confirm bulb presence and condition before installation, and have a replacement bulb on hand in case you need a swap during fitment.

What's the return window if it doesn't fit?

Test-fit the assembly against your vehicle before final installation. If there's any fitment concern, contact support with photos and your VIN before committing fasteners.