This TOPRAN crankshaft position sensor, part number 821 111, is designed to provide precise data about the crankshaft's position and rotational speed. Accurate readings from this sensor are crucial for the engine control unit (ECU) to manage fuel injection and ignition timing, optimizing engine performance and fuel efficiency. Manufactured to meet stringent quality standards, this sensor offers a reliable replacement for your vehicle's original component, ensuring seamless integration and consistent operation.