A number of Hyundai and Genesis models are being recalled due to an issue with the seat belt pretensioners.

The South Korean car manufacturer says that front driver-side and/or passenger-side seat belt pretensioners were installed from a suspect production lot containing pyrotechnic-type pretensioners that may deploy abnormally during a crash. Hyundai has yet to determine the cause of the abnormal deployment but says that the issue could cause metal fragments to enter the cabin during a crash, increasing the risk of injury to occupants.

Read Also: Hyundai’s Adorable New Casper Goes On Sale In Korea With A Sub-$12k Price And Plenty Of Kit

The suspect pretensioners were sourced from Korean company Samsong. The automaker became aware of the issue in mid-September after a crash involving a 2021 Elantra that saw the driver-side seat belt pretensioners allegedly deploy abnormally, causing metal fragments to enter the rear of the cabin and injuring an occupant’s leg. This is the only incident that Hyundai is aware of that’s related to the issue.

Involved in the recall are 2021 Hyundai Elantra models built between March 8, 2021, and April 15, 2021, 2021 Elantra HEV models built between March 8, 2021, and March 15, 2021, select 2021 Venue models produced between March 8, 2021, and March 22, 2021, as well as 2021 Genesis GV80 models built between March 9, 2021, and April 2, 2021, and 2021 GV70s manufactured from March 10, 2021, through to June 17, 2021. In total, 978 vehicles are involved in the recall.

Hyundai plans to notify owners by first-class mail from December 10, 2021, instructing them to bring their vehicles to a local Hyundai dealership where the seat belt pretensioners will be replaced at no cost.