ISOFIX systems are used for fastening child seats in a motor vehicle. A motor vehicle is provided in which the ISOFIX restraint systems have adequate crash safety despite being longer than customary ISOFIX securing clamps. This is achieved in that at least individual ISOFIX securing clamps have an overall length lying within a range of 50 mm to 120 mm, and a reinforcing component is mounted on each ISOFIX securing clamp at a body-side end of each ISOFIX securing clamp. Each reinforcing component has a height which corresponds to a length of longitudinal portions of each ISOFIX securing clamp, and a body-side portion of the longitudinal portions of each ISOFIX securing clamp is supported by each reinforcing component.