Abstract. If the engine of the car can be considered as the heart, then the E.C.U's represents the brain of the car. Electronic control units (E.C.U's) are electronic devices which control the way different components of a car (engine, windows, airbags, etc.) react in some situations (overheating, button pressed by a passenger, crash, etc.). Axiomatic design is a set of principles that theorizes the act of conceiving a new project. Based on two axiom this method comes into designers help, giving them the option to reach in a short period of time a fully functional and compliant product without supporting the design of the product on chance, past experiences or "try and fail" principle.