The John Deere RE551778 is a genuine OEM electrical switch designed for various John Deere agricultural and construction equipment. This high-quality switch provides essential control functions, ensuring reliable operation and seamless integration with your machinery's electrical system. It is a direct replacement part, manufactured to John Deere's rigorous standards for durability and performance. Confirmed fitment across numerous John Deere tractor, combine, sprayer, and forage harvester models, including the 6R, 7R, 8R, 9R series tractors, S-series combines, and R-series sprayers.