Do I need to run new wiring from the battery?

The switch mounts to the dash and handles the control circuit. You'll need to connect power and ground, but the switch comes ready to integrate into your vehicle's electrical system — no relay harness or additional modules required.

Will these bolt straight into the factory fog light openings?

Yes. These are designed to use the factory mounting points without drilling or cutting. Test-fit before securing to confirm alignment with your bumper opening.

Can I replace just one fog light if one burns out?

H11 bulbs are sold individually, so you can swap a burned-out bulb without replacing the whole assembly. Replacement bulbs are widely available and inexpensive.