The Toyota Prius entered the market in 1997 as a gasoline-electric hybrid vehicle and has gone through major developments in its motive power and gearbox systems. The Toyota Prius hybrid propulsion system joins a 1.8-liter four-cylinder engine with an electric motor which produces 121 horsepower in total output. Through its usage of continuously variable transmission (CVT) systems the powertrain system achieves maximum fuel efficiency and maintains smooth acceleration. The Toyota Prius has an aerodynamic shape that enables it to reach EPA ratings of 54 mpg in city driving and 50 mpg on highways through its low drag coefficient design. The third-generation Toyota Prius with model designation NHW20 received a redesigned chassis that delivered more room for posterior passengers and bigger trunk storage without affecting its compact liftback shape. The vehicle achieves better efficiency because the hood and tailgate use aluminum lightweight components as part of its construction. The Toyota Prius integrates two advanced features that include regenerative braking which utilizes braking energy to recharge the battery. Full maintenance of the Toyota Prius requires original components because Toyota subjects these parts to thorough quality tests before certifying them for reliability and durability according to their standards. Toyota maintains its dedication to high-quality components for reliable and efficient vehicles which keeps the Prius competitive in its hybrid market segment.