The 2009 Nissan Sentra is part of the sixth-generation of the compact vehicle model line. It comes available in 4 trim levels: 2.0, 2.0 S, 2.0 SL, and the sportier SE-R. Its engine options include a 140-hp 2.0-liter four-cylinder for the 2.0 trims and a 2.5-liter four-cylinder engine making 177-hp for the SE-R trim. All trims come with a continuously variable automatic transmission (CVT), with the exception of the base 2.0 trim which also offers a six-speed manual transmission. Its safety features comprise six airbags, active head restraints, and anti-lock brakes. Infotainment highlights are topped by an optional navigation system. The 2009 model-year noted an expansion of the standard safety equipment and optional amenities from premium trims to more accessible trims.