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Spark Plugs Replacement falls under the umbrella of automotive maintenance, specifically focusing on the fuel system. This process involves removing and replacing old spark plugs with new ones to ensure optimal engine performance. It is a crucial aspect of maintaining vehicle health, as faulty or worn-out spark plugs can lead to decreased fuel efficiency, misfiring engines, and difficulty starting the car. Regularly replacing spark plugs not only improves overall engine function but also contributes to the longevity of the vehicle.