Citing former US employees of Takata involved in the internal investigation, the Times said that Takata's tests discovered problems with the airbags' steel inflaters that could lead to explosive ruptures.
"But instead of alerting federal safety regulators to the possible danger, Takata executives discounted the results and ordered the lab technicians to delete the testing data from their computers and dispose of the airbag inflaters in the trash," the Times reported, citing the employees.
The company later reported its first tests for the airbag problem in 2008, when a relatively small recall was made.
Since then automakers have recalled nearly 8 million cars inside the United States and millions more elsewhere because of the danger that an airbag could improperly inflate and rupture, potentially firing deadly shrapnel at the occupants of a car.
The problem has been reportedly tied to four deaths and multiple injuries, and in the United States Takata is already facing a class action lawsuit over the problem.
Affected automakers include Honda, BMW, Chrysler, Ford, General Motors, Mazda, Mitsubishi, Nissan, Subaru, and Toyota.
The two senators, who serve on the powerful Senate Commerce Committee and are strong advocates for greater auto safety, have also urged the US National Highway Traffic Safety Administration to demand a nationwide recall of affected cars.
Copyright Agence France-Presse, 2014