Toyota is standing out as one of the few brands continuing to invest in hydrogen internal combustion engine (ICE) technology. The Japanese carmaker views hydrogen as a key part of its 'multi-pathway' solution to decarbonise the automotive sector. Toyota has been developing hydrogen ICE technology alongside hydrogen fuel-cell (FCEV) technology. Unlike FCEVs, which are quiet like battery-electric vehicles, hydrogen ICE technology incorporates a traditional combustion engine that produces sounds. Toyota's vice president of sales in Australia, Sean Hanley, emphasized that hydrogen combustion technology is 'very much alive and well' and will continue to develop over the next five years. Toyota showcased its commitment to hydrogen power through the Hydrogen HiAce prototype, a modified V6 engine powered by hydrogen gas instead of petrol. This prototype was part of a pilot program where fleet operators tested its performance. Toyota's investment in hydrogen power demonstrates its dedication to innovation in the automotive industry, despite the technology not yet being mainstream. While other brands like BMW and Mazda have explored hydrogen combustion engines, Toyota's persistence in developing hydrogen-powered vehicles highlights its forward-thinking approach to automotive decarbonisation.