The global hydrogen internal combustion engine (ICE) market is experiencing significant growth, with a forecasted value of US$ 51.3 billion by 2034, driven by a compound annual growth rate (CAGR) of 9.9%. This growth is primarily attributed to the increasing launches of hydrogen-powered trucks and buses in the transportation sector and the global shift towards clean energy solutions. Hydrogen ICEs are gaining traction as a viable alternative to traditional fossil fuel engines due to their ability to offer near-zero CO2 emissions, presenting a promising pathway towards reducing the environmental impact of heavy-duty vehicles. Key drivers of this market expansion include the surge in the launch of hydrogen-powered trucks by heavy-duty vehicle manufacturers and the rise in adoption of clean energy solutions worldwide. For instance, MAN Truck & Bus announced plans to introduce hydrogen-powered trucks in several markets in Europe, emphasizing the industry's commitment to sustainable transport. Governments and companies are increasingly pivoting away from fossil fuels towards alternative fuels like hydrogen, which produces no CO2 emissions when combusted. In regional outlook, Asia Pacific leads the hydrogen ICE market, supported by robust government backing and ambitious green hydrogen initiatives. Countries like India and China are making significant strides in hydrogen technology development and production. In Europe, proactive policies and incentives are driving market penetration as the region aims for zero-emission targets. Major players in the hydrogen ICE market, such as Toyota, Cummins, and Robert Bosch, are investing in advanced technologies like high-pressure in-cylinder direct injection and dual-channel turbocharging to ensure efficient combustion, high thermal efficiency, and improved engine stability. These companies are also forming strategic partnerships and enhancing their product portfolios to align with the industry's shift towards sustainable mobility. Recent key developments in the market include Cummins Inc. commencing production of hydrogen ICE for Tata Motors in India and Robert Bosch GmbH's announcement of launching hydrogen ICE for trucks, indicating a growing momentum in the industry. Overall, the market analysis encompasses detailed segment and regional evaluations, highlighting key trends, opportunities, and market dynamics.