Hiroshi Shimizu, Takata's senior vice president for global quality assurance, said his company took responsibility for three US deaths related to what he labelled "anomalies" in its airbags.
But he did not expand that acceptance of responsibility to a broader series of airbags installed for a decade in millions of cars from 10 major manufacturers.
And he did not agree with a call earlier this week by the National Highway Traffic Safety Administration for a full nationwide recall of cars with the suspect Takata airbags.
"We are deeply sorry about each of the reported instances in which a Takata airbag has not performed as designed and the driver or passenger had suffered personal injuries or deaths," Shimizu told the Senate Commerce Committee.
"While each instance of an airbag failure is terrible and unacceptable to Takata, it is also important to remember that Takata airbags continue to deploy properly as they were designed in accidents."
Shimizu admitted that the company had in the past discovered two problems with some of its airbags, regarding propellant pressure and humidity control.
But he insisted that every time an "anomaly" appeared, the company addressed it, and that its airbags are now safe.
Witnesses who appeared before the panel, which earlier this year blasted General Motors for its negligent handling of a deadly faulty ignition problem, included a woman who lost sight in her right eye from shrapnel from a Takata airbag in her Honda.
