Will these plug into my factory wiring harness?

Yes. These are designed to use factory connectors — no rewiring needed. Just remove the old lights and bolt the new housings in place.

Do I need to remove the bumper to install them?

No. Access from inside the cargo area or wheel well is standard. Check your vehicle's wheel well clearance before starting, but full bumper removal is not required.

Are the lenses sealed against water?

Chrome housings are built to shed water the same way factory lights do. Normal road use and car washes will not compromise them — just avoid pressure washing directly into the seams.