It will take at least three years for Takata and other manufacturers to make enough air bags to replace the company’s defective ones. Because of their chemistry, Takata’s devices become less stable over time. That leaves millions of drivers with cars that could contain an air bag that’s like a ticking time bomb. ... Takata, founded by the Takada family in the 1930s as a textile maker, produced parachutes for the Imperial Japanese Army during World War II. In 1960, Takata began manufacturing seat belts for Japan’s carmakers, which were leading the country’s industrial expansion. It was the only company whose seat belts passed the U.S. National Highway Traffic Safety Administration (NHTSA) crash test standards in 1973. ... Air bags deploy in controlled explosions. Their designs are drawn from rockets and munitions. A former Honda engineer, Saburo Kobayashi, described Takada’s reservations in a 2012 memoir. “If anything happens to the air bags, Takata will go bankrupt,” Takada said, according to the book. “We can’t cross a bridge as dangerous as this.” Eventually, he relented. ... Lillie says he left Takata in 1999, partly because the company ignored his warnings about ammonium nitrate. He says Takata’s executives and workforce were unprepared to take on such a difficult design and manufacturing process. “Takata engineers claimed they had this magic,” he says. “No one else could figure it out, and they had.”