Model- and component-based software development has emerged as an attractive option for the development of vehicle software on single-core platforms. There are many challenges that are encountered when the existing component models, that are originally designed for the software development of vehicular distributed single-core embedded systems, are extended for the software development on multi-core platforms. This paper targets the challenge of extending the structural hierarchies in the existing component models to enable the software development on multi-core platforms. The proposed extensions ensure backward compatibility of the component models to support the software development of legacy single-core systems. Moreover, the proposed extensions also anticipate forward compatibility of the component models to the future many-core platforms.