Toyota's hydrogen-powered Corolla has been participating in endurance races at the Fuji Speedway in Japan, showcasing advancements in thermal efficiency and liquid hydrogen usage. The project, which shifted to liquid hydrogen in 2023 for increased energy density and weight reduction, faced technical challenges like pump failures and fuel leaks during the recent race. Despite these issues, Toyota remains positive about the gains in performance and efficiency from the hydrogen ICE engine development. The company believes this technology will contribute to meeting emissions regulations like the Euro 7 standards set to come into effect in 2027. Toyota's commitment to exploring hydrogen as an alternative energy source in the automotive industry highlights the potential for carbon-free fuels and improved environmental sustainability. The switch to liquid hydrogen has shown a 40% reduction in refueling times, making it a more viable option for future vehicles. While the concept of production vehicles refueled with liquid hydrogen may seem distant, Toyota's efforts in engine development have led to a better understanding of engine heat efficiency. This innovation aligns with the company's goal of eventually selling combustion cars that only emit water from their tailpipes, emphasizing a long-term vision for cleaner transportation solutions.