MOTOR VEHICLE COMPRISING A CAB BODY FIREWALL WITH A LOWER CROSS BEAM AND AN UPPER CROSS BEAM

The invention relates to a motor vehicle (1) comprising: - a cab (2) comprising a dashboard (30), - a windshield (3) forming an upper front part of the cab and having a lower extremity (3L), - a driver assistance system comprising at least one sensor (10, 11) and a control unit (15), - a cab body firewall (20) forming a frame structure of a lower front part of the cab on which the dashboard is attached, the cab body firewall comprising: - a lower cross beam (21) holding the windshield by the lower extremity on an upper side (21U) of the lower cross beam, - an upper cross beam (22) holding the at least one sensor and arranged above the upper side of the lower cross beam, above the lower extremity of the windshield and below the dashboard.