Takata Corp. will be fined $14,000 for each day it fails to cooperate with a U.S. investigation into defects in its air bags that have led to millions of car recalls worldwide.

Transportation Secretary Anthony Foxx said Friday his agency has requested documents and other data from Takata about its air bags, and the company hasn't fully complied. The fines could reach a maximum of $70 million, based on U.S. law.

Regulators are investigating air bag inflators that may deploy with so much force that the part breaks and hurls metal shrapnel at the car's occupants. At least five fatalities in the U.S. and more than 100 injuries have been reported.