The phrase "redesigned grille" refers to making changes to the front part of a vehicle, specifically the grille, to make it look different or better than before. Full definition
The back part now offers upgraded taillights and redesigned grille with new mesh inserts. (carannouncements.com)
Nissan redesigns the grille for all 2010 models and the wheel covers in the 2010 1.8 S models. (automotive.com)
The 2016 Nissan Altima hits dealers Nov. 11 wearing an extensive, muscular makeover: Nissan heavily redesigned the grille, hood, bumper and front fenders — effectively, everything ahead of the... (Autoweek.com)