Toyota remains committed to investing in hydrogen combustion engine technology, viewing it as a crucial component of their decarbonisation strategy amidst growing environmental concerns in the automotive industry. Alongside their developments in hydrogen fuel-cell technology, Toyota has been exploring the integration of hydrogen internal combustion engines (ICEs) in their vehicle lineup. While the technology is still in its trial phases, Toyota's vice president in Australia, Sean Hanley, expressed optimism about the future of hydrogen ICE engines, suggesting that it will gain prominence as a mainstream powertrain technology by the next decade. The company has showcased prototypes like the GR Yaris H2 concept and the Hydrogen HiAce, which was trialed through a pilot program in Australia. The Hydrogen HiAce prototype, powered by a modified 3.4-litre V6 engine running on hydrogen, demonstrated the feasibility of hydrogen as an alternative power source. Despite the modifications required for the engine to run on hydrogen, Toyota has emphasized its ongoing commitment to hydrogen technology. This initiative aligns with Toyota's broader vision for a sustainable automotive future and highlights their proactive approach towards innovation and environmental responsibility.