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The ERA RPM sensor (part number 550638) plays a crucial role in your vehicle's engine management system. By accurately measuring the engine's rotational speed, this sensor provides vital data to the engine control unit (ECU). This information is essential for various engine functions, including fuel injection timing, ignition timing, and idle speed control. A properly functioning RPM sensor contributes to smooth engine operation, fuel efficiency, and overall vehicle performance. ERA is a reputable brand known for producing reliable automotive components. This sensor is built to meet stringent quality standards, ensuring durability and consistent performance in demanding automotive environments.