DETROIT — U.S. auto safety regulators have expanded an investigation into malfunctioning airbag controls to include 12.3 million vehicles because the bags may not inflate in a crash. The problem could be responsible for as many as eight deaths.
Vehicles made by Toyota, Honda, Kia, Hyundai, Mitsubishi and Fiat Chrysler from the 2010 through 2019 model years are included in the probe, which was revealed Tuesday in documents posted by the National Highway Traffic Safety Administration. It involves airbag control units made by ZF-TRW that were installed in the vehicles.
The control units can fail in a crash, possibly because of unwanted electrical signals produced by the crash itself that can disable an air bag control circuit housed in the passenger compartment, according to NHTSA documents. The electrical signals can damage the control circuit, the documents say.
ZF, a German auto parts maker which acquired TRW Automotive in 2015, said in a statement that it's committed to safety and is cooperating with NHTSA and automakers in the investigation.
The case is another in a long list of problems with auto industry airbags, including faulty and potentially deadly Takata airbag inflators. At least 24 people have been killed worldwide and more than 200 injured by the inflators, which can explode with too much force and hurl dangerous shrapnel into the passenger cabin. The inflators touched off the largest series of automotive recalls in U.S. history involving with as many as 70 million inflators to be recalled by the end of next year. About 100 million inflators are to be recalled worldwide.
On April 19, NHTSA upgraded the ZF-TRW probe from a preliminary evaluation to an engineering analysis, which is a step closer toward seeking recalls. So far, only Hyundai and Kia and Fiat Chrysler have issued recalls in the case. Four deaths that may have been caused by the problem were reported in Hyundai-Kia vehicles and three in Fiat Chrysler automobiles. NHTSA opened an investigation in March of 2017 involving the TRW parts in Hyundais and Kias.
The upgrade came after investigators found two recent serious crashes involving 2018 and 2019 Toyota Corollas in which the airbags did not inflate. One person was killed.
Jason Levine, executive director of the Center for Auto Safety, a nonprofit consumer group, said the ZF-TRW case shows the auto industry thus far has learned very little from Takata.
"A single supplier of an important safety component provided what appears to be a defective part across multiple manufacturers and 12 million cars," Levine said. "While the first fatality reports emerged three years ago, it has taken a higher body count for more significant action to be taken by NHTSA and most impacted manufacturers remain silent. The industry needs to do better."
A message was left Tuesday seeking comment from NHTSA.
In the ZF-TRW investigation documents, NHTSA said that it didn't find any other cases of electrical interference in Hyundai, Kia or Fiat Chrysler vehicles that used the ZF-TRW system but were not recalled. Also, the agency has not identified any other cases of electrical interference in other Toyotas including Corollas, since the company started using the ZF-TRW parts in the 2011 model year. In addition, no electrical interference cases have been identified in Honda or Mitsubishi vehicles with the same parts, the agency said.
NHTSA will evaluate how susceptible the airbag control units are to electrical signals as well as other factors that could stop airbags from inflating. The agency also "will evaluate whether an unreasonable risk exists that requires further field action."
Last year, Hyundai and Kia recalled nearly 1.1 million vehicles because of the problem, about a year after NHTSA opened its investigation.
Kia vehicles covered included 2010 through 2013 Forte compact cars and 2011 through 2013 Optima midsize cars in the U.S. Also covered are Optima Hybrid and Sedona minivans from 2011 and 2012. Recalled Hyundai vehicles included 2011 through 2013 Sonata midsize cars and the 2011 and 2012 Sonata Hybrid.
In 2016, Fiat Chrysler recalled about 1.9 million vehicles worldwide including the 2010 Chrysler Sebring, the 2011 through 2014 Chrysler 200, the 2010 through 2012 Dodge Caliber, the 2010 through 2014 Dodge Avenger, the 2010 through 2014 Jeep Patriot and Compass and the 2012 and 2013 Lancia Flavia.
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