白車身

白車身的定義：白車身（Body in White）按照車身術語標準和教科書上的定義，是指車身結構件及覆蓋件焊接總成，並包括前翼板、車門、發動機罩、行李箱蓋，但不包括附件及裝飾件的未塗漆的車身。塗裝后的白車身加上內外飾（包括儀錶板、座椅、風擋玻璃、地毯、內飾護板等）和電子電器系統（音響、線束、開關等），再加上底盤系統（包括制動、懸架系統等），再加上動力總成系統（包括發動機、變速箱等）就組成了整車。

車身定義：

Body in white or BIW refers to the stage in automotive design or automobile manufacturing in which a car body's sheet metal components have been welded together — but before moving parts (doors, hoods, and deck lids as well as fenders) the motor, chassis sub-assemblies, or trim (glass, seats, upholstery, electronics, etc.) have been added and before painting.

The name derives from manufacturing practices before steel unibody or monocoque bodies — when automobile bodies were made by outside firms on a separate chassis with an engine, suspension, and fenders attached. The manufacturers built or purchased wooden bodies (with thin, non-structural metal sheets on the outside) to bolt onto the frame. The bodies were painted white prior to the final color.