Nissan Sentra gets updated styling and an upgraded interior for 2004. The changes give the Sentra a more contemporary appearance with a toothy grille reminiscent of the 2004 Maxima. New model designations (such as 1.8 S and 2.5 S) indicate which of two engines is under the hood.For 2004, Sentra models get redesigned front and rear fascia and a newly styled hood. Also receiving changes for 2004 is the Sentra SE-R. New features include a new brake package for SE-R Spec V with Brembo- front discs, a new interior charcoal fabric and two new exterior colors ?? Volcanic Orange and Sapphire Blue. There are several interior upgrades as well, including a trip computer (standard on 2.5 S, SE-R and SE-R Spec V) and an enhanced Rockford Fosgate sound system.