Will this plug directly into my door panel without any wiring work?

Yes — this switch connects to the factory harness with no splicing or adapter needed. Seat it into the panel cavity and plug it in.

Do I need any fasteners or adhesive to secure it in the door?

The switch assembly is designed for factory mounting points in your door panel — fasteners are not included. Check your panel cavity for existing clips or retainers before installation.

Can I return this if it doesn't work once installed?

Test the switch before final installation if possible. Once seated and powered, you'll know immediately if all four window functions respond. Contact customer service with your order number if you need to discuss a return.