What is an ignition interlock?

An ignition interlock device is a hand-held breath-alcohol analyzer that connects to the ignition system of a vehicle. Before starting the car, the driver must complete a breath test verifying his or her Breath Alcohol Concentration to be below a preset limit. If the BAC test is at or above the pre-set limit the car will not start. There are safeguards built-into the device to prevent or detect unauthorized use or circumvention of the device. Most courts are now requiring the use of the device on any criminal conviction and on deferred prosecutions.

If a person is convicted of a violation of RCW 46.61.502 or 46.61.504 or an equivalent local ordinance, the court shall order that after a period of suspension, revocation, or denial of driving privileges, the person may drive only a motor vehicle equipped with a functioning ignition interlock or other biological or technical device.

The period of time of the restriction will be as follows:

  • One year if no prior IID
  • Five years if one prior IID
  • Not less than ten years with two prior IID requirements

Ignition interlock agencies include:

  • Northwest Interlock Inc. - 1-800-491-5665
  • AutoSafe - 1-800-977-0091
  • AutoSense of Washington - 1-877-256-9246
  • Alcohol Sens-O-Lock - 1-888-854-1922
  • Intoxalock Device - 1-877-777-5020
  • Ignition Interlock Systems, Inc - 1-800-328-9890