A module device for a camera system having a housing device, which is provided with an inner opening and configured to allow an adjustment of an installation position of the module device in a motor vehicle; it also includes a sensor holder device which has an upper region and a base region, is coupled to the housing device via at least one support element and configured to accommodate an image sensor; a lens apparatus which is coupled to the sensor holder device in the upper region via at least one connection element and configured to generate an optical image on the image sensor; and a retaining spring device which is coupled to the housing device and the base region of the sensor holder device and is configured to press the image sensor against the sensor holder device.