Do I need to tap into existing wiring or run new harness?

The switch mounts to factory locations and uses standard connectors. Routing and final integration depend on your vehicle's existing electrical setup—have a basic wiring diagram handy before install.

What if I need to replace the bulb later?

H11 bulbs are common and cheap. Pull the housing, unclip the old bulb, and install the new one—no special tools required.

Is there a return window if these don't fit my doors?

Standard ModSupply return policy applies. Install test-fit before committing—measure against your existing fog light openings if you have doubts about clearance.