Hyundai and Kia are recalling almost 1.2 million more cars in the United States for engine failures after customers reported additional failures since the original 2015 recall, according to filings with the National Highway Traffic Safety Administration (NHTSA). 7 that a voluntary recall by Hyundai Motor was being carried out for 171,348 vehicles from five Hyundai and Kia models, including the Grandeur (HG), Sonata (YG), K7 (VG), K5 (TF), and Sportage (SL). The 2011-14 Kia Optima and 2013-14 Hyundai Sonata sedans are also affected.

Hyundai and Kia are recalling some 1.2 million vehicles, because the engines can fail and stall. Affected models include the 2014 Ford Escape, 2014-2015 Ford Fiesta ST, 2013-2014 Ford Fusion and the 2013-2015 Ford Transit Connect with a 1.6 liter GTDI engine.

Kia Motors America should start its recall May 25 with the same process of notifying owners and having auto dealers inspect and possibly replace an engine assembly if needed at no charge.

Hyundai has submitted a plan to the National Highway Traffic Safety Administration to recall the Sonata and Santa Fe, both of which are made at Hyundai’s Montgomery plant.

Separately, Hyundai and Kia have sharply cut vehicle production in China, sources previously said, as anti-Korean sentiment and competition from Chinese brands play havoc on March sales and threaten earnings.

Owners of the recalled cars will likely hear a clunky sound from the engine that speeds up as the engine speed rises.

If this occurs, the engine could seize while the vehicle is in motion, increasing the risk of crash.

Neither company would estimate the potential cost of the recall. It was determined that the engine damage was caused by oil blockage from debris left in the engine blocks during manufacturing.

All the vehicles in question possess one of two engines – a 2.4-liter, direct injected, naturally aspirated I4, or a 2.0-liter turbocharged I4.

The Hyundai spokesperson said the latest recall does not involve the same part involved in the previous recall.