Do I need to modify or drill any holes to mount these?

No. These mount at factory fog light points—no drilling or custom brackets. Push them into the existing openings and secure with the provided hardware.

Will the switch work with my existing dashboard, or do I need to replace it?

The switch integrates into your factory dash location. It's a direct replacement—no adapter or rewiring of the dashboard panel needed.

What if one of the fog lights stops working after installation?

LED units typically fail at the diode level. Check the connector first—reseat it to make sure it's fully locked. If the light still doesn't come on, that unit will need to be replaced.