Do these plug straight into my factory wiring harness?

Yes. These housings use the factory electrical connectors—no rewiring or adapters needed. Plug them in and you're done.

What if a bulb burns out after I install them?

You've got spares. The set includes six bulbs total, so you can swap a replacement without ordering separately. Just match the bulb type to your vehicle's manual if you need more down the road.

Are these sealed against water inside the housing?

These are new OEM-style housings designed for standard exterior use. Inspect the gaskets during install to confirm they're seated properly—that's your water seal.