Motor vehicle rear structure comprising: an underframe component for supporting a motor vehicle floor, an axle component comprising a central part and, on each side of the central part, two lateral parts (22, 23) defining, with the central part, a space sized to accommodate a propulsion engine of the motor vehicle, a pivot member comprising a first pivot element and a second pivot element which are able to pivot relative to one another, the first pivot element being directly fixed to or integrated into the central part of the axle component and the second pivot element being directly fixed to or integrated into the underframe component, in which the rear structure is arranged in such a way that the first and second pivot elements pivot relative to one another about an axis (y) that is substantially horizontal and substantially perpendicular to the direction of travel of the vehicle in the frame of reference of the motor vehicle, when the first and second pivot elements are thus fixed to the central part of the axle component and to the underframe component of the motor vehicle, respectively, and in which the underframe component comprises an underframe part and two flanges (31, 32) secured to the underframe part, and the second pivot element is fixed to said flanges, characterized in that the second pivot element comprises a rod fixed to or of one piece with the flanges (31, 32), and the first pivot element comprises a ring mounted around the rod and secured to or of one-piece with the axle component, the first pivot element also comprising an additional ring welded to the central part of the axle component and of one-piece with the ring mounted around the rod. an underframe component for supporting a motor vehicle floor, an axle component comprising a central part and, on each side of the central part, two lateral parts (22, 23) defining, with the central part, a space sized to accommodate a propulsion engine of the motor vehicle, a pivot member comprising a first pivot element and a second pivot element which are able to pivot relative to one another, the first pivot element being directly fixed to or integrated into the central part of the axle component and the second pivot element being directly fixed to or integrated into the underframe component, in which the rear structure is arranged in such a way that the first and second pivot elements pivot relative to one another about an axis (y) that is substantially horizontal and substantially perpendicular to the direction of travel of the vehicle in the frame of reference of the motor vehicle, when the first and second pivot elements are thus fixed to the central part of the axle component and to the underframe component of the motor vehicle, respectively, and in which the underframe component comprises an underframe part and two flanges (31, 32) secured to the underframe part, and the second pivot element is fixed to said flanges, characterized in that the second pivot element comprises a rod fixed to or of one piece with the flanges (31, 32), and the first pivot element comprises a ring mounted around the rod and secured to or of one-piece with the axle component, the first pivot element also comprising an additional ring welded to the central part of the axle component and of one-piece with the ring mounted around the rod.