The global hydrogen combustion engine market is poised to experience significant growth, with a projected increase from USD 49.23 billion in 2024 to USD 94.68 billion by 2031, representing a Compound Annual Growth Rate (CAGR) of 9.8%. This growth is primarily fueled by the rising demand for emission-free vehicles and clean power solutions in response to environmental concerns from traditional internal combustion engines. Hydrogen combustion engines, known for emitting only water vapor during combustion, are gaining traction as governments worldwide promote the adoption of hydrogen-powered vehicles through incentives and supportive policies. Major automotive OEMs, including Toyota, are focusing on developing hydrogen combustion engine-powered vehicles, further propelling market growth. Market trends indicate a shift towards electric hybrid hydrogen vehicles that offer zero emissions during electric-only operation and extended range capabilities through hydrogen usage. Countries like Germany and France are investing in expanding their hydrogen refueling infrastructure to support the adoption of hydrogen-powered vehicles. Moreover, hydrogen combustion engines are finding applications in power generation as a cleaner alternative to diesel generators, providing reliable baseload power with no emissions. Additionally, these engines are increasingly being used in transportation sectors such as trucks, buses, and marine vessels due to the high energy density of hydrogen. The key market takeaways include the dominance of reciprocating engines in engine types, the prevalence of less than 500 KW power output segment, and the power generation segment being the key end-user. North America is expected to lead the market due to supportive government policies and investments in hydrogen infrastructure. Key players in the hydrogen combustion engine market include AGCO Corporation, Ballard Power Systems Inc., BMW Groups, and Toyota Corporation, among others, focusing on new product development and partnerships to drive innovation and market growth.