[DETROIT] Fiat Chrysler Automobiles' Ferrari sports car brand has been fined US$3.5 million for not filing "early warning reports" indicating safety issues with US safety regulators, the National Highway Traffic Safety Administration said on Friday.

Ferrari has been required since 2011 to file quarterly early warning reports, because that was the year that Fiat began selling cars in the US market. Before then, Ferrari as a small-volume manufacturer did not have to file the reports.

Ferrari admitted that it violated the law when it failed to submit required reports to NHTSA, a part of the US Department of Transportation, over a three-year period, and failed to report three fatal incidents, NHTSA said in a statement.