(CNN) - Honda has expanded a recall of its vehicles made from 2001 to 2006 because the airbags could explode.
The addition is on top of the 5 million cars Honda has already recalled over the defects. The airbags are made by a Japanese company named Takata.
The move comes amid disturbing allegations that Takata knew a decade ago that its airbags were potentially lethal to drivers and passengers.
Instead of fixing the problems, Takata executives allegedly hid their own test results and ordered the faulty units be shipped to car assembly plants around the world, the New York Times reported Friday.
Takata airbags are found in at least 10 brands of cars, resulting in recalls of nearly 8 million vehicles due to the faulty airbags.
At issue are incidents of the airbags sending metal fragments hurtling toward drivers and passengers.
One car safety groups says exploding airbags are responsible for four deaths.