This report analyzes the risks associated with hybrid passenger vehicles, which utilize both electric motors and petrol/diesel engines. It highlights the increasing demand for these vehicles due to environmental concerns but also addresses the inherent risks. These risks include potential hazards from high-voltage equipment, battery issues (mechanical, electrical, chemical, and explosion risks), and additional weight affecting fuel efficiency and vehicle handling. The report discusses risk management strategies, such as using off-board battery chargers, modifying mechanical equipment, and using low-voltage machines to mitigate electrical risks. It also emphasizes the need for driver education due to the unique characteristics of electric engines. The implications of these risks on vehicle projects, including design changes to address secondary circuit errors and the incorporation of warning devices, are also examined. The report concludes that while hybrid vehicles offer environmental benefits, their associated risks, such as battery problems and electrical hazards, require careful consideration and mitigation strategies.