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One common cause of vehicle fires is spilled fuel. When fuel is spilled, it creates a highly flammable environment, especially when combined with heat sources such as engine components that operate at high temperatures. Vehicles are equipped with systems designed to contain fuel, but if there is a leak or if fuel is spilled during refueling, this can lead to ignition if it comes into contact with a spark or hot surface. It's important for drivers to handle fuel carefully and ensure that any spills are cleaned up promptly to minimize the risk of a fire.

In contrast, excessive speed and driver distraction are more likely to lead to accidents or collisions rather than direct causes of fire. Improper tire pressure can cause tire blowouts, which may lead to accidents, but it is less directly related to a fire starting in a vehicle compared to spilled fuel.