This genuine Claas part 0021530791 is an engine speed sensor designed for precise monitoring of engine RPM. Essential for optimal engine performance and system control in a wide range of Claas agricultural machinery. It ensures reliable operation and accurate data feedback for models including AXION 800, AXION 900, ARION 500, ARION 600, XERION 4000, XERION 4500, XERION 5000 tractors, LEXION 600, LEXION 700, LEXION 8000, LEXION 7000, TRION 500, TRION 600, TRION 700 combines, and JAGUAR 800, JAGUAR 900 forage harvesters.