An Ignition Interlock Device (IID) is a hand-held breathalyzer that is attached to the starter of the vehicle. The IID must be used prior to starting the vehicle and intermittently while driving. A failed breath test will be recorded (and reported during calibration) if a driver’s Blood Alcohol Concentration (BAC) is over .02 or if the driver misses or skips an intermittent breath request. A vehicle will not start or go into gear if BAC is too high.
Any driver convicted of a Wisconsin OWI with a BAC over .15 or with two or more Wisconsin OWI convictions must have an IID installed on each vehicle titled in his or her name. The IID remains installed in the vehicle for the length of your license suspension.
There are many privately owned car maintenance locations that offer IID installation, however, not all of them are recognized or certified service centers. For a list of certified service centers near you, click the links below. The average cost of an IID in Wisconsin ranges from $950-$1,600** per year for each vehicle.
**Contact provider for actual costs. Costs include typical installation, 12 months service, calibration and monitoring fees, if applicable, and removal fee. Higher installation fees may be encountered with key-less ignition systems, remote starters and/or security systems.**