Will these fit my factory fog light openings without any cutting or drilling?

Yes. These are designed as a direct swap into your OEM fog light housing. No cutting, drilling, or bracket fabrication required—they bolt in where your halogen units were.

Do I need a wiring harness or relay to run these LEDs?

Wiring requirements aren't specified in the product data. Test-fit them first to confirm connector type, then source any necessary adapters or harnesses based on what you find. Most LED retrofits run cleaner on a dedicated relay circuit.

Can I return these if they don't work once installed?

Contact ModSupply directly for return and warranty details. Always verify fit and function before final assembly to avoid installation complications.