Do these mount at the factory side marker points?

Yes. These are designed as direct replacements that mount at the OEM positions — no drilling or bracket fabrication required.

Will I need a wiring harness or adapters?

These markers use factory mounting points, but confirm your vehicle's connector type before ordering. Some vehicles may require a simple harness adapter available separately.

Are the bulbs included?

The lights ship as marker assemblies. Confirm bulb type and availability for your model year — you may need to source bulbs separately based on your specific application.