Will this interfere with my factory trailer hitch or sensor bracket?

Test-fit the bar on your bumper before final fastening. If your vehicle has integrated sensors or hitch components, verify clearance at mounting points — mounting method not specified in product specs.

Does this need primer before I install it?

The bar ships unprimed. You can paint it to match your bumper or leave it as raw panel — depends on your finish preference and install timing.

What hardware do I need to bolt this on?

Fasteners are not confirmed as included. Check your Civic's service manual for factory bumper bracket bolt specs and gather hardware before install.