The Renault COVER is a synthesis research vehicle built around the Renault 19, a European mid-range, mass production model car (1). Improvements have been made to the basic Renault 19 in order to ensure efficient safety to all occupants, adults and children, particularly in case of asymmetrical impacts, frontal at 65 Km/h and rear at 50 Km/h. Independently of economical standpoint, all improvements chosen are production line feasible and could be progressively be incorporated into future cars. There is a 20 kg weight increase over the Renault 19, resulting from improved protection in the case of frontal and rear impacts. Structural modifications and the new seat types used are the main causes of this weight increase.