Spark plugs are small but essential components in an engine’s ignition system, responsible for igniting the air-fuel mixture inside the combustion chamber. Each time the engine cycles, the spark plug generates a high-voltage spark that starts the combustion process, powering the engine. They play a direct role in engine performance, fuel efficiency and emissions. Worn or faulty spark plugs can lead to misfires, poor fuel economy, rough idling and difficulty starting the engine. Regular inspection and timely replacement of spark plugs help maintain smooth acceleration, optimal fuel consumption and overall engine health.