The 3541581M91 is a genuine OEM heater assembly designed for McCormick, Massey Ferguson, and Landini agricultural tractors. This essential component ensures proper cabin heating, providing comfort during operation. Confirmed fitment includes McCormick MC, MTX, and XTX series; Massey Ferguson 5400, 6400, 7400, and 8400 series; and Landini Legend, Powermondial, and Vision series. This heater assembly measures approximately 400 mm in length, 170 mm in width, and 130 mm in height, with a weight of 2.5 kg.