Will this fit bumper-mounted fog light cutouts?

The OEM cutout locations on your bumper will determine whether modifications are needed. Before installation, verify your existing fog light positions against this bumper's profile. If your fog lights sit outside the M5 design, you may need to carefully adapt the openings. Reference your vehicle's service manual or original bumper as a template.

Does this cover OEM sensor holes in the lower valance?

This bumper is designed around factory mounting and sensor placement. Check your vehicle's OEM bumper sensor locations before installation. If your parking sensors sit in positions that align with this bumper's profile, they'll function normally. If not, you'll need to evaluate whether drilling or adapting sensor openings is necessary for your specific setup.

What prep work is required before painting?

Sand the surface with appropriate grit to ensure paint adhesion, then clean thoroughly to remove all dust. Once prepped, the bumper is ready for your choice of basecoat and clear. For best results, follow your paint manufacturer's recommended surface prep and application steps.