Nissan redesigned its smallest sedan for 2000, with bigger dimensions for its fifth generation. Introduced after the 2000 model year began, the "entry-level" 4-door was the first version to be designed exclusively for the U.S. market. XE and uplevel GXE versions used a 1.8-liter 4-cylinder engine that made 126 horsepower. The sportier SE got a 145-horsepower 2.0-liter four. A 5-speed manual transmission was standard with either engine, but a 4-speed automatic was optional. A special Sentra CA, sold in California, met that state's Super Ultra Low Emission Vehicle requirements. Antilock brakes and front side airbags were optional, as a package for the GXE and SE only. The SE sedan had standard 4-wheel disc brakes and was the only Sentra available with a sunroof. XE and GXE models rode on 14-inch steel wheels, while the SE got standard 15-inch alloy wheels. An in-dash CD changer was optional only for GXE and SE sedans.