The McCormick 4221143M91 electronic board is a genuine OEM component 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, X8.680, and X8.690 models. This critical circuit board ensures proper electronic system control and functionality. It measures 95 mm in length, 51 mm in width, 25 mm in height, and weighs 0.12 kg. This part supersedes the older part number 3617068M91.