According to the site below, most vehicles have an airbag on/off switch. Please see the link below for more information.
You will need to remove the fuse identified as "passenger airbag". the fuse box is located on the driver's side kick panel.
Yes it does
The passenger airbag is on a Weight Detection System. The only way to enable it is to Bypass the weight detector.
This is a safety feature that is designed to turn off the passenger airbag if there is a child (or smaller adult) in the passenger seat that the airbag is not designed for. If there isn't anyone/anything in the seat while this is happening, this would suggest a faulty sensor.
You could always unplug it but the airbag light would stay on. To fix that you could remove the bulb from your cluster. WARNING: while doing any tampering with airbag circuits etc. make sure to disconnect your car battery. Failure to do so could cause inflation of the airbag which would damage your dash. -Dalisword-
They are junk! all 2004 passenger air bags are peeling up and dashes are also bubbling. G.M. should be ashamed of themselves
First, ensure that the child seat is not in front of a working air bag. If installing in the passenger seat, disable the airbag. Otherwise, install as normal using either the LATCH system or the seatbelt.
If there is no key to turn the airbag off, then you cannot legally do this. You can apply for a waver to allow for the disabling of the airbag. My question is, Why are you wanting to disable the airbag. Airbags save lives. Put the children in the rear. If this is a later model vehicle then there is a sensor in the seat that automatically shuts the air bag off when it senses something or someone in the seat. If the person o object isn't heavy enough, the sensor shuts the airbag off and there should be an indicator light somewhere on the dash that informs you the airbag is off. Both my 2004 Liberty and 2007 Pacifica do this. I don't recommend placing children in the front but if you do, and your vehicle is equipped with this feature, the airbag should shut off.
You can pull the airbag fuse, disconnect sir yellow wire at steering column that goes to the clockspring, or disconnect the battery neg cable. The last is foolproof but will clear out anything with a memory.
I believe it is behind the rear passenger tire. You have to pull out the plastic in the wheel well to get to it.