For Freightliner Cascadia 116 and 126 trucks from 2018 through current years, the cab splash shield is a replacement exterior part made from durable injection-molded plastic designed to mount at the rear of the hood and help protect the cab's underside from road debris, water and grime while preserving the truck's exterior profile. It is available individually, chooses driver or passenger side, and replaces OEM numbers 22-73807-000 and 22-73807-001, with a warranty against defects in workmanship and material. Since it's a direct replacement rather than aftermarket universal piece, confirming correct fitment for your specific Cascadia before ordering is recommended. This cab splash shield contributes to maintaining an intact front end on heavy-duty trucks with a robust plastic construction suited to frequent highway use.