The fourth generation of the Subaru Legacy was introduced in 2003 and saw a complete redesign of the Legacy on an all-new platform. Development began by the beginning of 1999, with styling freeze in early 2001 and engineering sign-off in 2003.

The Subaru Outback is an automotive nameplate used by the Japanese automaker Subaru for two different SUV-themed vehicles: a Legacy-derived crossover station wagon, the Outback, and an Impreza-derived off-road themed hatchback, the Outback Sport (1994–2011).