NHTSA investigators found more consumer complaints about airbag and brake problems.
Driver of a 2007 Honda Civic died last year in India.
More than 1.5 million vehicles affected.
More than eight million vehicles affected, according to data from Transport Canada.
Replacing inflators on 700,000 vehicles from 2001 to 2010.
Stage set for a showdown between NHTSA and the Japanese auto parts company.
Honda, Mazda and Nissan affected; defective airbags could explode.
NHTSA scrambling to find out how from other automakers how their air bags function.
Supplier Taka says there may be s many as 3 million vehicles affected.
Potential problems with airbags and wipers in 2006 to 2012 models cited.