The McCormick 6525601M91 is a genuine 12V voltage regulator designed for optimal electrical system stability in McCormick and Massey Ferguson agricultural equipment. This essential component ensures consistent power delivery, protecting sensitive electronics and maintaining battery charge. It is a direct replacement for OEM part numbers including Massey Ferguson 3617307M91, AGCO 3617307M91, and Perkins 2871A163. With precise dimensions of 95mm length, 51mm width, and 51mm height, and a weight of 0.12kg, this regulator offers reliable performance and a perfect fit for a wide range of compatible models.