The ignition system of an MX5 NB (1998–2000) determines exactly when the air---fuel mixture in the cylinders is ignited. Through ignition coils, spark plugs, sensors, and electronic control, a powerful spark is generated at the right moment, ensuring the engine runs smoothly and performs efficiently. On older cars, heat, vibrations, and wear often affect components that are constantly under electrical stress. This can become noticeable during idling, starting, or when the engine accelerates under load. As long as the signals from the sensors and engine electronics remain reliable, the ignition system can continue to function accurately.
