Ignition Interlock Device (IID) Resources

A breath alcohol ignition interlock device (BAIID or IID) is attached to the ignition of a vehicle and is designed to prevent a vehicle from being operated by a person who has consumed alcohol. When properly installed and calibrated, the IID will prevent a driver from starting a vehicle if the device detects a breath alcohol concentration (BrAC) above the prescribed setpoint.

For more information, FAQ's regarding DOL IID requirements, and IID forms (i.e. medical exemption, financial assistance), please visit www.dol.wa.gov/driverslicense/ignitioninterlock.

For more information and links to WA State approved IID manufacturers, please visit www.wsp.wa.gov/driver/duiimpaired-driving/ignition-interlock