The 2004 Nissan Sentra is part of the B15 generation compact sedan. It features four trims: 1.8, 1.8S, SE-R, and SE-R Spec V. The base 1.8 trims come with a 1.8-liter 4-cylinder engine with a horsepower of 126. The more performance-oriented SE-R trims offer a bigger 2.5-liter 4-cylinder engine that delivers 165 horsepower for the SE-R and 175 horsepower for the Spec V. A 4-speed automatic and a 5-speed manual transmission are available for the 1.8 trims, while SE-R gets a 4-speed automatic and Spec V features a 6-speed manual, with all models having FWD. Safety features include front-seat side airbags and antilock brakes. The Sentra comes with a fairly basic interior, but it is comfortable and well-sorted. The 2004 year marked the addition of the 1.8S trim and cruise control became standard on certain models.