Wagon also known as estate car is a body style of sedan or saloon with extended roof over shared cargo or passenger volume with access at back through fifth or third door instead of trunk lid. This particular body style transforms standard three-box design into two-box design including A, B and C-pillar along with D-pillar. Station wagons have the flexibility to allow configurations that either favor cargo or passenger volume. The American Heritage Dictionary describes wagon cars as a vehicle with one or more rows of removable or folding seats behind driver. When a model range includes plenty of body styles like sedan, station wagon and hatchback, the versions usually share their platform, bodywork and drivetrain.     

Wagon cars have evolved from their early use as specialized cars for carrying passengers and cargo from one destination to other from train station. These vehicles are common nomenclature in New Zealand, United States, Canadian and Australian English. Various manufacturing companies like Citroen, Audi and BMW have sold this vehicle as Break, Avant or Touring. Wagons are some of the best kept secrets in United States automotive market and they come with same passenger room and driving characteristics as sedans, but provide more cargo room.