Car alarms became a familiar street sound with electronic security systems fitted to everyday vehicles, using chirps to confirm locking and a louder siren when triggered. Online, this Portuguese labelled version, alarme de carro, circulates on soundboards alongside the English car alarm name, which helps it reach both audiences. Editors reuse it as a shortcut for theft, vandalism or a clumsy accident without needing any dialogue. Its recognisable pattern has made it a staple for short comedy clips, roleplay games and fake alert videos.