Obturator for an opening in a vehicle body, and vehicle body part equipped with such an obturator

The trapdoor (7) has a locking mechanism that is fixed with a bumper skin of a headlight washer (10) for positioning the trapdoor. Fixation units (19, 22) are attached with the bumper skin for displacing the trapdoor in an integrated manner with the washer. The locking mechanism is removed by breaking, in order to permit the fixation units to be operational.