The U.S. government has a warning about counterfeit airbags that can propel fiery metal shrapnel at passengers or not deploy at all.

Authorities say organized criminals are selling counterfeit airbags as replacements after a crash.

“If you're replacing an airbag in your car, deal with a reputable supplier and ask questions about where the replacement part came from,” said John Morton, the head of Immigration and Customs enforcement.

The bogus bags are mainly imported.

A news release from the National Highway Traffic Safety Administration stated:

• "Consumers whose vehicles have been in a crash and had their air bags replaced by a repair shop that is not part of a new car dealership within the past three years or who have purchased a replacement air bag online should contact the call center that has been established by their auto manufacturer to have their vehicle inspected at their own expense and their air bag replaced if necessary. The full list of call centers and additional information are available at www.SaferCar.gov."