The Bosch 3131090043 is a genuine OEM ignition resistor designed for agricultural tractor applications. This essential electrical component provides 1.8 Ohms of resistance and operates at 12V, ensuring proper voltage regulation for the ignition system. It is a direct fit replacement for various Massey Ferguson tractor models, maintaining optimal engine performance and reliability. Confirmed fitment includes a wide range of Massey Ferguson 100, 200, 500, 1000, and 1200 series tractors.