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
Washington Administrative Code
Please note that some of the documents provided on this page are available in Adobe® PDF format only and will require the Adobe® Reader in order to view or print them from your Web browser.