Electronics systems for modern vehicles must be designed to meet stringent requirements on real-time performance, safety, power consumption, and security. Hardware/software codesign techniques allow system designers to create platforms that can both meet those requirements and evolve as components and system requirements evolve. Design methodologies have evolved that allow systems-of-systems to be built from subsystems that are themselves embedded computing systems. Software performance is a key metric in the design of these systems. A number of methods-of-methods for the analysis of worst case execution time have been developed. More recently, we have developed new methods for software performance analysis based on design of experiments. Formal methods can be used to verify system properties. Systems must be architected to maintain their integrity in the face of attacks from the Internet. All of these techniques build upon generic hardware/software codesign techniques but with significant adaptations to the technical and economic context of vehicle design. © 2010 IEEE.