The 2021 Altima S offers: 16-inch steel wheels, Remote engine start, Keyless entry and ignition, Height-adjustable driver's seat, 60/40-split folding rear seat, 7-inch touchscreen, Six-speaker audio system, Bluetooth phone and audio streaming, Single USB port, Safety features on the base S include: Forward collision warning, Automatic emergency braking, Lane departure warning, Driver attention warning. The SV builds on the base S equipment by adding: Driver Assist package, 17-inch alloy wheels, LED headlights, 8-inch touchscreen, Apple CarPlay and Android Auto compatibility, Satellite radio, An additional USB-C port up front and two rear USB ports.