Will this plug directly into my factory wiring harness?

Yes, it's designed as a direct swap. Connect to your existing 3rd brake light connector and you're done — no rewiring required.

Do I need to remove anything from the interior to install this?

No. Installation happens from outside at the rear hatch area. You'll access it from the outside trim panel — no cabin disassembly needed.

Does the LED work with my factory brake switch and wiring, or do I need a separate module?

It works with your factory wiring. The LED module is built into the assembly, so your existing brake circuit powers it without any additional hardware or converters.