Auto makers Hyundai Motor (HYMLF and Kia Motors (KIMTF said today that they plan on recalling roughly 1.5 million vehicles in the U.S. and South Korea over engine issues, Reuters reports. 

The recall could cost the two firms hundreds of millions of dollar each.

The two automakers have presented a plan to recall 1.3 million vehicles due to an engine defect that could cause cars to stall, the companies said in a statement.

The plan, which must be approved by U.S. authorities, concerns Hyundai's Sonata and Santa Fe, and Kia's Optima, Sorento and Sportage.

Both also said they were recalling 171,348 vehicles in South Korea due to a similar manufacturing problem.

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