The contact owns a 2018 Chrysler 300. The contact stated that while driving at an undisclosed speed, the contact became aware that the air bag warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed that the seat belt module had failed and needed to be replaced. The vehicle was repaired; however, the failure recurred. The dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for further assistance. The approximate failure mileage was 115,000.