What is a unibody vehicle?

• A. A vehicle where the body and frame are built as one unit
• B. A vehicle with a separate frame
• C. A vehicle with no frame
• D. A vehicle whose body is detachable

Answer: (A)

In a unibody vehicle, the body and the chassis are built as one integrated unit. The structure that forms the passenger compartment and the exterior shell also serves as the vehicle’s frame, providing rigidity, crash performance, and load paths without a separate, standalone frame. This is why most modern cars feel tight and light, with fewer separate large steel pieces.

This differs from a vehicle with a separate frame, where a distinct chassis supports the body—common in many trucks and some SUVs. The idea of having no frame isn’t accurate for production cars, since even unibody designs rely on an integrated, rigid structure as their “frame.” A detachable body isn’t typical in standard vehicles, though some concept or specialty designs may explore removable bodies.