Will this switch control all four windows or just the driver's window?

This is the master control switch, so it operates all four windows from the driver's door panel. Passenger and rear switches control their own windows independently.

Do I need to remove the entire door panel to swap this out?

You'll need to access the door panel interior to unclip and disconnect the old switch, then plug in the new one. The switch itself sits in the armrest area — basic screwdriver and panel removal tools are all you need.

What if the new switch doesn't work right after I install it?

Check that the connector is fully seated and the door panel clips are properly re-engaged — loose connections are the most common issue. If windows still don't respond, test another switch or verify power at the connector before returning.