The automotive and energy industries are at the forefront of a transformative era driven by the urgent need for sustainability, innovation, and electrification. With rising environmental concerns and evolving consumer demands, automotive engineering has shifted from traditional paradigms to green energy solutions and vehicle electrification. These advancements are shaping the future of mobility and are pivotal in addressing global challenges such as climate change, energy security, and urban air quality.  It brings together cutting-edge research and insights from academics, industry professionals, and postgraduate students working at the nexus of automotiveengineering, green energy technologies, and sustainable mobility solutions.  This book presents the peer-reviewed papers from the 6th International Conference on Automotive Innovation and Green Energy Vehicles, AiGEV 2024, held during September 16-18, in Putrajaya, Malaysia. The collection is organised into three thematic sections, serving as a comprehensive resource on cutting-edge developments in automotive technology, green mobility, and sustainable energy solutions. Section I: Automotive Innovations focuses on hybrid-electric vehicle energy management and optimisation, vehicle electrification, aerodynamic enhancements, advanced lubricant technologies using nanoparticles, railway bearing diagnostics, and multi-degree-of-freedom vehicle dynamics modelling. This section bridges theoretical modelling with practical applications to reduce emissions and improve system performance. Section II: Green Energy Technologies examines solar module efficiency enhancements via hybrid cooling techniques, innovative solar still designs with energy storage materials, nanofluid applications for heat transfer, floating solar installations, hydrogen fuel cell efficiency, battery thermal management using computational fluid dynamics and power quality improvements in grid-connected renewable energy systems. These contributions collectively advance the efficiency, scalability, and reliability of sustainable energy technologies. Section III: Mechanical Engineering presents innovations in electric vehicle battery thermal management, applied mechanics problems, autonomous vehicle safety validation using digital twin frameworks, motorcycle design safety analysis, combustion dynamics in turbocharged engines using ethanol blends, sustainable solar drying systems, and 3D-printed biomechanical applications. Together, these works emphasise the integration of computational simulation, experimental validation, and interdisciplinary design thinking to solve real-world engineering challenges. This volume offers valuable guidance for researchers, engineers, industry professionals, and policymakers, while serving as an authoritative reference for educators and students in automotive engineering, sustainable energy systems, and mechanical engineering