A "filler panel" refers to a section of a larger space or object that is used to fill in empty or unused areas. It essentially fills up the gaps or spaces left over when something does not fully occupy or cover a particular space. Full definition
14 We're going to have to get used to double filler panels for plug - in hybrids. (automobilemag.com)
The TT offers two - tone color schemes, front grille filler panel, and custom wheels as available options. (automotive.com)
Moonlight Blue Metallic 2017 Audi A6 2.0 T Premium Plus quattro quattro 8 - Speed Automatic with Tiptronic 2.0 L 4 - Cylinder TFSI Front Filler Panel, quattro, Nougat Brown w / Leather Seating Surfaces, 19» Sport Package, 4 - Zone Automatic Climate Control... (shoppok.com)