Hyundai is recalling half a million midsize cars as of September 25^th, 2015, due to a manufacturing problem in the engines.

Hyundai is having a recall on 470,000 Sonata Sedans from 2011 to 2012 with 2 liter or 2.4 liter gasoline engines in the United States. On Friday, Hyundai said the metal debris may not have been fully removed from the crankshaft area while the engines were being processed at their engine plant in Alabama. This could restrict oil flow to the rod bearings, causing it to fail. If this happens, the engines could stall and cause a car crash. At the moment, Hyundai said it has no record of any accidents or injuries from the problem. The company said the rod bearing will make a constant “Knocking” sound, and the oil pressure warning light will turn on if a car has this problem. Only when the person continues to drive the car is when the engine will finally begin to stall. The 2011 Sonata Sedans were the first Hyundai vehicle to use engines from Alabama, which is why the company asks these cars to be brought back. A spokesman for the company said Hyundai car dealers will inspect and replace the engines at no cost to owners. They will also increase the engines’ warranty for 10 years or 120,000 miles.

Hyundai said Sonata Sedan owners will receive a notification of when they may take their cars back to the dealer on November 2^nd, 2015, and another one when the replacement engines are available.