What are the major safety precautions to pay attention to during car maintenance?

[LondynLynn]

Car maintenance requires attention to the following major safety precautions: Remove the ignition key: When performing vehicle maintenance, remove the ignition key to prevent others from starting the vehicle. Depressurize the fuel system: When servicing the fuel system of an EFI engine, the fuel lines must be depressurized first to prevent gasoline from leaking and splashing onto exposed high-voltage wires or hot objects, which could cause a fire. Prevent injury from fan blades: When repairing an engine that is running, take care to prevent injury from fan blades or burns from hot components. Check engine oil before starting: Before starting the engine, check that the oil and coolant meet the requirements; ensure the gearshift is in neutral; and engage the parking brake. If starting indoors, open doors and windows for proper ventilation. After starting, immediately cut off the fuel or air supply to prevent a "runaway engine" accident.