Last year Fiat Chrysler recalled 1.4 million US vehicles after security researchers remotely controlled a Jeep.
People who suspect their car has been hacked were told to get in contact with the FBI.
The public service announcement laid out the issues and dangers of car hacking.
“Modern motor vehicles often include new connected vehicle technologies that aim to provide benefits such as added safety features, improved fuel economy and greater overall convenience,” it read.
“With this increased connectivity, it is important that consumers and manufacturers maintain awareness of potential cybersecurity threats.”