Will this bolt straight to the factory mounting points?

Yes. This assembly is designed for direct mounting at the factory rocker points with no drilling or bracket work needed.

Do I need the bulb, connector, or any wiring harness?

The assembly ships as a housing only. You'll transfer your existing bulb and connector from the old unit—no additional wiring required.

What if it doesn't seal properly after installation?

Test-fit the assembly before final tightening. If gaps appear, check that mounting bolts are fully seated at factory points. Refer to your vehicle's service manual for proper torque specs if adjustment is needed.