The McCormick 4207860M91 is a genuine OEM sensor designed for various McCormick X-series tractors, including X4.20, X4.30, X4.40, X4.50, X4.60, X5.20, X5.30, X5.40, X5.50, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680 models. This sensor is also compatible with several Landini tractor models, ensuring proper functionality and system integration. It replaces OEM part numbers Landini 3704230M91 and Argo Tractors 3704230M91.