OPENING PANEL MADE FROM PLASTIC, WHICH CONTINUES TO BLOCK THE OPENING IN THE BODY SHELL IN THE EVENT OF AN IMPACT

Motor vehicle sub-assembly () comprising a first part () made of plastic material forming an outer bodywork skin, and a second part () made of plastic material forming an internal structure to which said first part () is attached, characterised in that the second part () comprises at least one mechanical reinforcement () made of thermoplastic material having a Young's modulus less than that of the plastic material of the second part (), and a coefficient of elongation at break greater than that of the plastic material of the second part ().