A fastening device fastens an airbag module to an airbag receiver on an instrument panel of a vehicle by forming at least one mechanical connection and at least one welded connection between the airbag module and the instrument panel. The instrument panel has at least one projection and a flange protruding from the projection to define a compartment and form a fastening bracket for the mechanical connection of the airbag module to the instrument panel. The instrument panel and the airbag receiver have welding ribs for the welded connection between the airbag receiver of the airbag module and the instrument panel. A device prepares an instrument panel and a corresponding instrument panel. A method includes steps of fastening an airbag to the instrument panel and a vehicle with a corresponding instrument panel.