This thesis explores the application of the circular economy in the automotive industry, with a particular focus on electric cars and hydrogen cell cars. The circular economy, which is based on the principles of sustainability, reuse, recycling and waste reduction, is an alternative to the traditional linear model of production and consumption. The thesis analyzes how the application of these principles can contribute to reducing the environmental footprint of the automotive industry and increasing efficiency in the use of resources. Electric cars and hydrogen cell cars are key technologies for reducing greenhouse gas emissions and dependence on fossil fuels. However, both technologies face challenges related to sustainability, including battery and hydrogen production, waste management, and recycling. This work explores how the concept of circular economy can help address these challenges, including innovative approaches in battery recycling, component reuse, and the development of sustainable methods for energy production. The paper emphasizes the importance of integrating the circular economy into all aspects of vehicle production and use, in order to achieve long-term sustainability of the automotive industry. It explores guidelines and best practices that can serve as a basis for the further development of electric and hydrogen cell cars within the framework of the circular economy. This work contributes to the understanding of how the automotive industry can transition to a more sustainable business model, while reducing its environmental impact and encouraging innovation.