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Vehicle & Driver · Ignition Interlock Devices

This page contains information about ignition interlock breath alcohol devices certified by the Washington State Patrol. At the request of the state's municipal and district court judges, we have provided a list of manufacturers and devices as a public service.

Washington State's DUI laws and penalties have changed for driving under the influence of alcohol and other drugs.

The new laws permit municipal and district court judges to impose additional sanctions on individuals who have been arrested for DUI of alcohol. This may include ordering some offenders to install an ignition interlock breath alcohol device on their cars.

The device, attached to the car's ignition system, requires the driver to blow into the device before starting the car. If alcohol is detected, the car won't start.

Interlock Devices & Manufacturers

Each ignition interlock device model listed below is certified to be used in the state of Washington. Information about certification standards is available by writing to the Impaired Driving Unit, Washington State Patrol, 811 E. Roanoke, Seattle WA 98102.

To locate an ignition interlock installer in your area, call one of the ignition interlock manufacturers listed below.

Note: The Washington State Patrol does not endorse any manufacturers, dealers, or products. Their appearance on this page confirms only that the products have been certified by the Washington State Patrol and meet federal rules for breath alcohol ignition interlock devices.

Documents & Forms

Laws & Informational Sites

Revised Code of Washington

  • RCW 46.04.215 - Ignition interlock device; Other biological or technical device; Definitions.
  • RCW 46.20.710 - Ignition interlocks, biological, technical devices; Legislative findings.
  • RCW 46.20.740 - Ignition interlocks, biological, technical devices; Notation on driver's license; Penalty.
  • RCW 46.20.750 - Ignition interlocks, biological, technical devices; Assisting another in starting or operating; Penalty.
  • RCW 46.37.005 - State patrol; Additional powers and duties.

Washington Administrative Code

Resource Information

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Ignition Interlock Device

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