Will this fit if my bumper has sensor holes?

This is a grille trim molding, not a full bumper cover. If your bumper has factory PDC or parking sensor cutouts, they won't interfere with this trim piece — it mounts to the grille opening itself, above and around sensor areas.

Do I need the left-hand side as well?

This is the RH (passenger side) piece only. If you need both sides, you'll want to order the matching LH trim molding separately.

What's involved in installation?

Mounts at factory grille attachment points using existing hardware. Basic hand tools and a socket set are typical. Refer to your vehicle's service manual for torque specs and exact fastener locations.