This paper looks at car occupant injury data collected in Oxfordshire over a 24 month period;​ both injury and non-injury accidents are included in the sample which is representative of the area in terms of impact type and severity. Accidents were reconstructed, where appropriate, with the CRASH 2 program, so that the velocity change of each vehicle could be determined. The emphasis in the analysis is on the car interior and how it relates to injury. Common sources of injury are analysed in relation to the body regions affected and the types of impact in which they occur, Front and side impacts are established as priority areas and the distributions of velocity change for these impacts are analysed in relation to injury severity so that implications of providing occupant protection at different levels of crash severity can be assessed. Finally, anthropometric dummy response is compared to injury severity for head and chest injuries to restrained occupants in frontal impacts.