The global hydrogen internal combustion engines market is on a significant growth trajectory, with a predicted increase from USD 22.06 billion in 2025 to approximately USD 51.76 billion by 2034, expanding at a CAGR of 9.94%. This growth is primarily fueled by the automotive industry's focus on reducing carbon emissions due to environmental concerns. Europe leads the market with a 41% share in 2024, driven by robust government support and stringent regulations against carbon emissions. The adoption of hydrogen-based alternatives for heavy-duty vehicles and national hydrogen strategies in countries like Germany and the UK further propels market growth in the region. The integration of artificial intelligence in hydrogen internal combustion engines is revolutionizing efficiency, performance, and emission reduction. AI-powered sensors optimize engine parameters in real-time, enhancing fuel efficiency and minimizing emissions, along with enabling proactive maintenance. In North America, the government's promotion of cleaner energy solutions is boosting the adoption of hydrogen-based energy, particularly in vehicles. The region's automotive and aerospace industries are embracing hydrogen internal combustion engines to comply with stringent emission regulations. Asia Pacific is witnessing rapid growth driven by climate change awareness and the increasing demand to reduce greenhouse gas emissions. Research and development efforts have made hydrogen combustion engine technology more affordable, making it a favorable option for long-range transportation in the commercial sector.