What is body in white?

Body in white (BIW) refers to the stage in automotive manufacturing where a car's metal structure, including the frame, panels, and other components, is assembled but not yet painted or outfitted with the engine, interior, or other finishing touches.

The term "body in white" comes from the fact that the metal structure is usually white in color before paint is applied. The BIW is typically the first major stage in the production process after the individual components have been stamped or molded.

The BIW serves as the structural foundation of the vehicle, providing strength and rigidity to ensure the car's safety and durability. It is also a critical stage for ensuring that the vehicle meets design specifications and quality standards.

Once the body in white is completed, it will move on to the next stages of production, which may include painting, assembly of the engine and other mechanical components, installation of the interior, and final quality control checks before being shipped out to dealerships for sale.