Unibody construction integrates the body and structural frame as a single manufactured unit. Most modern passenger cars, crossovers, and many SUVs use unibody design. It reduces weight and improves fuel efficiency and handling compared to body-on-frame designs.
Unibody construction is relevant to used vehicle inspection and appraisal. Significant collision damage to a unibody vehicle can affect structural integrity in ways that are not always visible. Dealers should factor unibody repair history into condition assessments and pricing when accident history is present.