Those who remember the Takata airbag crisis may feel a sense of déjà vu. The National Highway Traffic Safety Administration is warning drivers about dangerous replacement airbag inflators made by Detiannuo in China. Shrapnel from malfunctioning inflators has already killed eight drivers, according to the agency.

Detiannuo manufactures replacement airbag inflators. In the U.S., they are only available on the black market. Investigators believe they may have been installed in vehicles that had already been involved in crashes and needed airbag replacements. In some cases, mechanics may have tried to save money. In others, customers may have paid for authorized parts and unknowingly received illegal components instead.

“As DTN has acknowledged on its website, the inflators are prohibited from sale in the United States. Whoever is bringing them into the country and installing them is putting American families in danger.” — NHTSA

How these airbags are failing

The Detiannuo inflators are not simply failing to deploy. According to the NHTSA, they are rupturing during crashes. The agency says the inflators are “sending large metal fragments into drivers’ chests, necks, eyes and faces.” It adds that the fatal crashes it’s studied would have been otherwise survivable.

So far, investigators have documented 10 crashes linked to these inflators. Those incidents resulted in eight deaths and at least two serious injuries. Authorities identified the illegal inflators in Chevrolet Malibus and Hyundai Sonatas. However, the agency warns they could be installed in other vehicles as well.

The NHTSA is working with law enforcement to determine how many of the faulty inflators are in the U.S. The agency has floated 10,000 as a preliminary estimate.