Will this plug straight into my dashboard without modification?

Yes. This switch is designed to snap into the factory opening on your Camry's dash. No cutting, drilling, or adapters needed.

Do I need to disconnect the battery before installing this?

It's a good practice to disconnect the negative battery terminal before removing the old switch and installing the new one. This prevents accidental shorts while you're working in the dash area.

What if my new switch doesn't turn the fog lights on?

Check that the fog light bulbs themselves are good and that the wiring harness is seated fully. If bulbs and connections are fine, the switch is likely defective — contact support for a replacement.