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The ERA Detonation Sensor (551354A) plays a crucial role in modern engine management systems. It monitors the engine for abnormal combustion events, commonly known as knocking or detonation. When detonation is detected, the sensor sends a signal to the engine control unit (ECU). The ECU then adjusts ignition timing to prevent engine damage caused by these harmful vibrations. This ensures optimal engine performance and longevity. ERA is a trusted brand for automotive electrical components, and this sensor is built to meet rigorous quality standards. Its reliable performance contributes to the overall health and efficiency of your vehicle's engine.