Assembly of an air guide to a structural element of a motor vehicle, and corresponding vehicle

An assembly comprising:

• an air guide on a structural component of a motor vehicle;
• and
• at least two fastening means of the air guide to the structural component, said fastening means being disposed on lateral edges of said air guide and of the structural component, each fastening means comprising a first fastening component integral with the air guide and a second fastening component integral with the structural component, the first and second fastening components being formed to work together in a same fastening direction,
• wherein the fastening means project laterally from a frame defined by the lateral edges of the structural component in a direction substantially perpendicular to the fastening direction,
• wherein the first fastening component is joined to the air guide by retaining means formed to break following an impact in a direction substantially parallel to the fastening direction, and
• wherein the lateral edges of the air guide exhibit guide parts situated substantially opposite second fastening components, each guide part being formed to guide a lateral edge of the structural component supporting a second fastening component inside the air guide following a breakage of the retaining means of the first fastening component working together with said second fastening component, the breakage resulting in a movement of the air guide towards the structural component in a direction substantially parallel to the fastening direction.