Are you talking about just seat covers, like Clazzio, or actual replacement seat material. For the former, nothing to it. Just remove the headrest and arm rest and pull the cover over the existing seat and secure it according to the instructions. If the later then your best bet would be to disconnect the battery, unplug the air bag from under the seat, and take the seat out of the car to work on it. Once you have replaced the seat material with the new cover then just hook it all back up and bolt it in to place, then reconnect the battery. You really shouldn't have any problems with the air bag as long as you do not pinch any of the wiring for it or puncture it.