There could be several reasons. First check the air pump. Start with the fuses, then the switch in the trunk. Then check the pump with direct current. If the pump works with a bypass, then check the...
If you are refering to an air bag in an automobile, then those bags are filled, very quickly, from a pyrotechnic device called a gas generator mounted at the base of the bag.Small sensors mounted in...
Your question is incomplete. Did they blow out while driving or has been leaking(as in everytime you drive it it has to air up) and now they have gotten to rotted to hold air. FYI the life span...