What is an ignition interlock device?

  • An ignition interlock device is placed on a car that is owned or registered to an individual who has been convicted of a DWI.
  • For a first offense, the issuance depends on the blood alcohol level.
  • For subsequent offenses, it becomes mandated by the courts.
  • The expense to put that interlock device on the car is born by the defendant and will prevent the vehicle from being operated if the person has a certain blood alcohol level.