A vehicle is a complex system whose behavior is the result of the interaction between its components like wheels, powertrain, chassis, suspensions, commands. Understanding how the different subsystems influence the behaviour in terms of fuel consumption, performance, and handling is essential for an automotive engineer. Even if the task of the automotive engineer can be focused on a specific aspect or a part, the understanding of the system level effects is essential to optimise the design. The aim of the course is to provide the system level knowledge of the the vehicle behaviour. Components such as tyres and wheels, suspensions, brake and steering systems are analysed to understand their functions, their structure and construction, and how to model their behaviour. The knowledge of the subsystem components allows then to compute vehicle performance in terms of speed, acceleration fuel consumption, stability and handling.