Window assembly (350, 450) for a window opening of a motor vehicle having a front-rear direction, comprising: a door frame member having an outer surface; a movable window pane (330, 430) having an outer window surface (332, 432) and a guiding means (340, 440); and a window guiding profile (300, 400) fastened to the door frame member, and being configured to guide the window pane (330, 430) along a direction of movement between an open position and a closed position, the window guiding profile (300, 400) including: a fastening portion (300a, 400a) being configured to fasten the window guiding profile (300, 400) to the door frame member, a sealing portion (305, 307, 320, 407, 420) being configured to seal the window pane (330, 430), an accommodating opening (304, 404) being configured to accommodate the window pane (330, 430) and extending in an accommodating direction being parallel to the front-rear direction, an inner guiding leg (301, 401), an outer guiding leg (302, 402) comprising a locating means (110, 210, 310, 410), and a guiding base (303, 403) connecting the inner guiding leg (301, 401) and the outer guiding leg (302, 402); wherein the guiding means (340, 440) and the locating means (310, 410) cooperate to prevent a movement of the window pane (330, 430) out of the accommodating opening (304, 404) along the accommodating direction, wherein the outer guiding leg (302, 402) comprises a bracket leg (309, 409) defining a receiving opening (309a, 409a) extending in the opposite direction relative to the accommodating opening (304, 404), characterized by a mounting bracket (360, 460) fastened to the window guiding profile (300, 400), the mounting bracket (360, 460) being configured to reinforce the outer guiding leg (302, 402). a door frame member having an outer surface; a movable window pane (330, 430) having an outer window surface (332, 432) and a guiding means (340, 440); and a window guiding profile (300, 400) fastened to the door frame member, and being configured to guide the window pane (330, 430) along a direction of movement between an open position and a closed position, the window guiding profile (300, 400) including: a fastening portion (300a, 400a) being configured to fasten the window guiding profile (300, 400) to the door frame member, a sealing portion (305, 307, 320, 407, 420) being configured to seal the window pane (330, 430), an accommodating opening (304, 404) being configured to accommodate the window pane (330, 430) and extending in an accommodating direction being parallel to the front-rear direction, an inner guiding leg (301, 401), an outer guiding leg (302, 402) comprising a locating means (110, 210, 310, 410), and a guiding base (303, 403) connecting the inner guiding leg (301, 401) and the outer guiding leg (302, 402); a fastening portion (300a, 400a) being configured to fasten the window guiding profile (300, 400) to the door frame member, a sealing portion (305, 307, 320, 407, 420) being configured to seal the window pane (330, 430), an accommodating opening (304, 404) being configured to accommodate the window pane (330, 430) and extending in an accommodating direction being parallel to the front-rear direction, an inner guiding leg (301, 401), an outer guiding leg (302, 402) comprising a locating means (110, 210, 310, 410), and a guiding base (303, 403) connecting the inner guiding leg (301, 401) and the outer guiding leg (302, 402); wherein the guiding means (340, 440) and the locating means (310, 410) cooperate to prevent a movement of the window pane (330, 430) out of the accommodating opening (304, 404) along the accommodating direction, wherein the outer guiding leg (302, 402) comprises a bracket leg (309, 409) defining a receiving opening (309a, 409a) extending in the opposite direction relative to the accommodating opening (304, 404), characterized by a mounting bracket (360, 460) fastened to the window guiding profile (300, 400), the mounting bracket (360, 460) being configured to reinforce the outer guiding leg (302, 402).