Updated on February 3rd, 2021 at 10:49 pm


An Ignition Interlock Device is a breathalyzer which is installed in the vehicle and connected to starter.  The IID checks the Blood Alcohol Concentration (BAC) of the driver prior to starting the vehicle and throughout the driving trip, usually every 15-30 minutes.  The IID ensures a driver is not consuming alcohol prior to driving or during a driving trip.

Who Gets an IID?

An IID must be installed for any person found guilty of a Wisconsin OWI second offense or greater.  A person guilty of a Wisconsin OWI first offense with a BAC over .15 will also be ordered to install an IID.  The IID must be installed on each vehicle you drive and for the duration of your driver’s license suspension.

What Happens if I Fail an IID While Driving?

The IID will beep every 15 to 30 minutes during a driving trip, requiring the driver to perform an alcohol breath test on the device.  If a driver fails an IID test, not only will the driver know, but so will surrounding drivers.  The driver will be in a very uncomfortable situation as the radios blares, the horn honks, the lights flash, etc.  The device reports all failed tests when taken in for calibration.

Where Do I Get an IID Installed? How Much Does it Cost?

There are several certified service centers in each county.  Click here to view the service centers in your county.  The cost is about $1,200-$1,300 per year for one vehicle.  If you license is suspended for two years, you are expected to pay nearly $3000 for each IID.

Who Should I Hire for a Wisconsin OWI?

Hire Wisconsin OWI Defense Attorney Nathan J. Dineen.  He has the knowledge and skills to aggressively fight your Wisconsin OWI charge.  Attorney Dineen practices 100% OWI Defense in Wisconsin.  Contact him at 877-384-6800 for a Free Case Review.

Nathan J. Dineen