You must disable the air bag system after a collision before starting any work on the steering wheel, steering column, driver or passenger air bag, seat belt tensioner, side curtain air bag or components of the instrument panel. First, take off the battery negative cable and wait for two minutes so the systems capacitor can discharge. Any car or truck coming back onto roads after a supplemental restraint is used must have all the used restraints replaced. If the driver air bag has gone off, the Clock Spring has to be changed; if the passenger air bag has gone off, the passenger air bag door must be replaced. When one or both front air bags go off, the tensioners need to be replaced as well. When a side curtain air bag is used, all the parts linked to the bag-the air bag unit, headliner and upper A, B and C-pillar trim-must be replaced because they are not suitable for further use and could be damaged. air bag deployment leaves a powdery material in the cabin, made mostly from safe air bag activation particles and possibly traces of sodium hydroxide which can irritate your skin, eyes, nose or throat. For this reason, you should always have on safety glasses, rubber gloves and a long-sleeved shirt while cleaning up. In case the skin feels irritated, run cool water on it and if the nose or throat start to bother you, leave the vehicle to get fresh air. Follow the local laws when getting rid of all kinds of air bags and seat belt tensioners. First, take out both air bags and both seat belt tensioners and then use a vacuum cleaner to clean up any remaining powder inside the car, making sure you vacuum the heater and air conditioning ports. Use the blower on the lowest setting of both your heater and air conditioner to pick up the powder that comes out and you might have to vacuum the area a second time to clean everything.