30.0 Hydrogen vehicles are on track to enter the race as a clean and viable alternative to traditional fossil fuel-based vehicles transport, and this could bring about real change in the way our transport systems evolve in the future. In a hydrogen vehicles, the fuel cell converts hydrogen into direct current, which supplies a power electronic converter to drive the electric motor. Some key elements that determine the reliability of the vehicles are the hydrogen tank, fuel cell, power electronic converter, control system, mechanical transmission, body, chassis and wheels. The power electronic converter is most susceptible to this because it contains temperature-sensitive semiconductor components. The study considers two operating condition parameters, namely torque and vehicle speed. These are the input variables that are being investigated in current research to understand the impact on the repair rate, failure rate, and availability of the power electronic converters in hydrogen vehicles. Using Arrhenius' law, the results show that with higher torque, failure and repair rates increase, while vehicle speed has little influence. In addition, permanent magnet synchronous motors have higher reliability and availability compared to three-phase induction motors, so permanent magnet synchronous motors in hydrogen vehicles are more robust. Numerical results are provided to highlight such trends and demonstrate the need for optimization of the power converter design to maximize the overall reliability of the vehicle.