The recall covers 470,000 Sonata sedans from the 2011 and 2012 model years equipped with 2-liter or 2.4-liter gasoline engines. At the time, the Sonata was Hyundai's top-selling vehicle in the U.S. Hyundai says that during manufacturing at Hyundai's Alabama engine factory there could not be all metal debris removed from the crankshaft area. This may cause a limitation of oil flow to the connecting rod bearings, and since they are cooled by oil, they could fail. If that happens, the engines could stall and cause a crash.
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