Everything you need to know about the Takata airbag recall

More than 30 million vehicles in the United States, made by 10 different automakers, have been recalled to replace frontal airbags on the driver’s side or passenger’s side, or both. The airbags, made by major parts supplier Takata, were mostly installed in cars from model year 2002 through 2008, although it has been expanded through 2014 in some cases. Some of those airbags could deploy explosively, injuring or even killing car occupants.
At the heart of the problem is the airbag’s inflator, a metal cartridge loaded with propellant wafers, which in some cases has ignited with explosive force. If the inflator housing ruptures in a crash, metal shards from the airbag can be sprayed throughout the passenger cabin— a potentially disastrous outcome from a supposedly life-saving device.
Nailing down the root cause and determining which of Takata’s several inflator designs is implicated has been tough for Takata, the automakers, and independent investigators to establish. It now appears there are multiple causes, as well as several contributing factors, including poor quality control in manufacture, several years of exposure in high heat and humidity regions, and even the design of the car itself. If the propellant wafers break down, due to high humidity or another cause, the result is that the propellant burns too rapidly, creating excessive pressure in the inflator body.