Also known as

Side Skirt

Rocker Panel Molding

Exterior Moulding

Lower Door Trim

Ground Effects Panel

Aerodynamic Trim

What this part does

This exterior trim component mounts directly to the lower rocker sill area of the chassis. It serves as both an aerodynamic deflector and a physical barrier, shielding the inner structural metal from road spray, salt, and impact debris. Integrated into the vehicle's styling, this specific piece is designed to route airflow smoothly along the lower flanks to reduce drag and lift at highway speeds. If cracked, detached, or missing, it leaves the underbody vulnerable to accelerated corrosion, exposes the raw pinch welds, and often creates turbulent wind noise during transit.

Fits these vehicles

OEM and interchange numbers

51717340190

51-71-7-340-190

51 71 7 340 190

Before you order

Match the provided OEM number exactly against the part stamped on the back of your original broken unit. The BMW 7 Series utilizes different lower sill moldings depending on whether the vehicle is equipped with the standard body or the M Aerodynamics package. Inspect the metal sill flanges on your vehicle prior to installation; if the underlying metal was crushed or bent by a jack or curb impact, this panel will not seat flush against the body. This specific piece requires correct factory expanding rivets and plastic clips to anchor securely into the chassis holes. Attempting to reuse old, brittle clips usually results in panel gap issues or high-speed detachment. This panel is finished in Imperial Blue Brilliant Effect; check your vehicle's factory paint code sticker to ensure a direct match if you do not plan on having the component repainted.