Will this bolt straight into my factory housing, or do I need to modify anything?

This is designed as a direct replacement into the factory license plate housing. No cutting, drilling, or housing modifications needed — pull the old lamp, install the new one.

Do I need to splice wires or will it plug into the factory connector?

Mount configuration and connector type not specified — verify your lamp housing connector before ordering to confirm compatibility with this assembly.

How long do LED license plate lamps typically last compared to stock bulbs?

LED units outlast incandescent by a significant margin and draw less power, which also means less strain on your electrical system over time.