Do I need to wire the switch myself or does it come pre-wired?

The switch is included, but final wiring to your vehicle's electrical system will require basic hand tools and familiarity with your Corolla's fuse panel. Refer to your service manual for proper switch integration and power source routing.

Will these fit into my factory fog light holes without modification?

These are designed for factory mounting points—no drilling or custom fabrication. Test-fit before final installation to confirm alignment with your specific vehicle's openings.

Are the bulbs and wiring harness included?

The kit includes the light assembly, bezels, and switch. Verify bulb type and any additional harness connectors against your vehicle's wiring before purchase to avoid last-minute trips for compatibility parts.