A spokeswoman for Ford Motor Company says the automaker will cooperate with a probe launched by the nation's attorneys general.
The investigation by the National Association of Attorneys General centers on the safety record of the Crown Victoria Police Interceptor.
About 350,000 of the vehicles are on the nation's roads as patrol cars for approximately 80-percent of police departments.
Since 1983, more than a dozen officers have died in crashes when their Crown Victoria's gas tank caught fire after being hit from behind.
The automaker has denied the cars are dangerous, but initiated a program of retrofitting older models with plastic shields designed to better protect the gas tanks.