客车制造包括巴士制造与客车制造两大类。早期的客车制造起源于马车，以及后来的卡车制造。现代的客车制造商包括底盘制造和车身制造，以及整车制造三类。

• 总重：荷载与非荷载情况下的车辆重量
• 刚性：试验通过的要求
• 尺寸：最大长度、宽度和高度

A coachbuilder is a manufacturer of bodies for automobiles and a manufacturer of complete horse-drawn vehicles.

Coachwork is the body of a motor vehicle (automobile, van, bus or truck), a horse-drawn coach or carriage (whence the term originated, derived from the Hungarian town of Kocs), or, by extension, a railroad car or railway carriage. The term is usually reserved for bodies built on a separate chassis, rather than being of unitary or monocoque construction. With reference to motor vehicles, auto body is the standard term in North American English. An obsolescent synonym is carrossery (plural: carosseries).