Hyundai will take back 572,000 cars in the U.S. over problem with engine failure in late-model Sonata and Santa Fe Sport vehicles. Kia is taking back an evaluated 618,160 vehicles for the same problem.

The machining process of the crankpins may produce an uneven surface roughness, according to Kia documents filed with the National Highway Traffic Safety Administration

The Problem: The engines in certain Hyundai and Kia vehicles could stall due to errors that were made during the manufacturing process. Metal debris may not have been properly removed from the oil passages of the engine crankshaft. This debris could restrict oil flow to the bearings, increasing temperatures and causing premature wear. Also, the machining process of the crankpins may produce an uneven surface roughness, according to Kia documents filed with the National Highway Traffic Safety Administration.

If a connecting rod bearing becomes worn, the engine will produce a cyclic knocking noise. The engine warning lamp or oil pressure warning lamp may be illuminated on the instrument panel, the document says.

The Fix: Drivers can take their vehicles to the dealership for a free repair. Here, technicians will inspect the engine and install a new short block if necessary. Hyundai is expected to begin its recall on May 19, while Kia’s will start on May 25.

Number of Vehicles Potentially Affected: Certain 2013-2014 Sonata and Santa Fe Sport vehicles are included in Hyundai’s recall. Kia is recalling certain 2011-2014 Optima, 2012-2014 Sorento, and 2011-2013 Sportage vehicles.