Bloomberg reports the Center for Auto Safety, citing a government petition from former General Motors researcher Donald Friedman, is asking the National Highway Traffic Safety Administration to open a defect investigation into 2003 – 2010 Chevrolet Impalas over a glitch in the car’s software that could “misread a passenger’s weight,” preventing frontal airbags from deploying. The agency has 143 records of fatalities linked to failed airbags in the Impala, 98 of which noted the occupants were wearing seat belts at time of death.

The request reflects growing concern over the algorithms used in advanced airbags, designed to meet strengthened U.S. regulations in 2003 after previous airbags were found in 300 cases to prove fatal to small adults and children due to excessive force upon deployment, and where improvements could be made.

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