A diagnosis system for the automatic diagnosis of the condition of wear of predetermined components of a land vehicle; the system comprising: - a diagnosis station comprising a support base , which is fixed to the ground and is configured to support approximately at ground level at least two wheels (R) of the land vehicle (VT); and an image acquisition assembly , which is coupled to said support base in such a way to be positioned, in use, at least partially below the land vehicle (VT) and is configured to acquire images from below of the predetermined components of the land vehicle (VT); the image acquisition assembly comprising two first image acquisition devices , each of which is arranged on the support base at a support zone of a respective wheel (R) of the land vehicle (VT) and is configured to acquire first images of components of a suspension (S) of the land vehicle (VT) in proximity to said respective wheel (R); the support base comprising two movable plates , each of which is configured to support a respective wheel (R) of the land vehicle (VT) and to move the respective wheel (R) in a direction (D1; D2) substantially parallel to the ground and substantially parallel to the rotation axis of each wheel (R) ; and - a control unit configured to control the movement of each movable plate (18; 19), to control the image acquisition assembly so as to acquire the first images of the predetermined components of the land vehicle (VT) when a wheel (R) of the land vehicle (VT) is moved by means of the respective movable plate in a direction substantially parallel to the rotation axis of each wheel (R), and to determine the condition of wear of said components of the suspension (S) as a function of the first acquired images; each first image acquisition device being fixed to the support base in the space comprised between the two movable plates . - a diagnosis station comprising a support base , which is fixed to the ground and is configured to support approximately at ground level at least two wheels (R) of the land vehicle (VT); and an image acquisition assembly , which is coupled to said support base in such a way to be positioned, in use, at least partially below the land vehicle (VT) and is configured to acquire images from below of the predetermined components of the land vehicle (VT); the image acquisition assembly comprising two first image acquisition devices , each of which is arranged on the support base at a support zone of a respective wheel (R) of the land vehicle (VT) and is configured to acquire first images of components of a suspension (S) of the land vehicle (VT) in proximity to said respective wheel (R); the support base comprising two movable plates , each of which is configured to support a respective wheel (R) of the land vehicle (VT) and to move the respective wheel (R) in a direction (D1; D2) substantially parallel to the ground and substantially parallel to the rotation axis of each wheel (R) ; and - a control unit configured to control the movement of each movable plate (18; 19), to control the image acquisition assembly so as to acquire the first images of the predetermined components of the land vehicle (VT) when a wheel (R) of the land vehicle (VT) is moved by means of the respective movable plate in a direction substantially parallel to the rotation axis of each wheel (R), and to determine the condition of wear of said components of the suspension (S) as a function of the first acquired images; <EOS>