One of the challenges in expanded use of finite-element (FE) simulations for occupant protection research is the availability of validated vehicle models that can represent varied vehicle types and safety designs. The objective of this study was to develop a publicly available, parametric FE model representing a diverse set of driver and front passenger compartments and restraint systems to enable automated and efficient population-based crash simulations. A previously published driver compartment model was expanded in this study to include the front passenger area with additional airbags. Using a mesh morphing method, the updated vehicle model was morphed into interior geometries representing four vehicles with varied sizes. All modeled restraint components are parameterised. LS-DYNA simulation results using the vehicle-specific models were compared with US-NCAP frontal and side impact tests with ATDs. Belt and airbag parameters were tuned to provide a good match to ATD responses. A set of population-based crash simulations were then conducted with 200 human body models with a wide range of size and shape to demonstrate the feasibility and robustness of the automated crash simulation concept. This is the first study to develop a parametric FE model of both driver and passenger seating positions.