Your airbag is not machine washable.
Regular cleaning (damp cloth): remove the In&box, wipe the textile parts with a damp sponge and a little soapy water, taking care never to wet the back of the airbag (the electronic part), then leave it to dry on a hanger for 12 hours, away from direct sunlight.
Water jet: remove the In&box, the inflator and the back protector, hang the airbag on a hanger and rinse it with clean, cold water (keep at least 1 m from a water jet, or 2 m from a pressure washer) for 10 minutes maximum. Never wring it out.
By hand: soak the airbag in cold, lightly soapy water without wetting the aluminium nozzle, wash it gently without twisting it, then rinse, for 10 minutes maximum. Leave it to dry on a hanger for 12 hours.
Full procedure in our help centre.