Will this bolt directly into my Q50 without any drilling or modification?

Yes. This uses factory mounting points at the headlight housing—no drilling or bracket fabrication needed. Line up the assembly and secure at the OEM attachment points.

Do I need to buy the bulb separately?

Bulb is not included with this assembly. You'll need to source the correct bulb type for your model year and swap it into this housing.

What's the return process if this doesn't fit right when it arrives?

Test-fit the assembly before final installation. If there's a fitment issue, contact us with photos showing the mismatch—we'll work out a resolution on a case-by-case basis.