The McCormick 4218042M1 Detector is a genuine OEM component engineered for various McCormick X-series agricultural tractors. This essential part ensures proper system functionality and is compatible with models including the X4.20, X4.30, X4.40, X4.50, X4.60, X5.35, X5.45, X5.55, X5.100, X5.110, X5.120, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, X8.680, X8.690, X6.45, X6.55, X6.60, X6.70, X6.80, X6.90, X7.44, X7.45, X7.60, X7.70, X7.80, X7.90, X8.60, X8.70, X8.80, and X8.90.