The 2003 Saturn Ion is a 4-door, 5-seat Sedan, available in 10 trims, ranging from the 1 (M5) Sedan to the 3 (CVT) Coupe. Upon introduction, the $11,430 1 (M5) Sedan is equipped with a standard 2.2L, 4-cylinder, engine that achieves 26-mpg in the city and 33-mpg on the highway. a Manual transmission is standard. The $16,430 3 (CVT) Coupe is equipped with a standard 2.2L, 4-cylinder, engine that achieves 24-mpg in the city and 32-mpg on the highway. an Automatic transmission is standard.