​​​Who can be ordered to install an IID?

Wisconsin Act 100, which took effect on July 1, 2010, requires judges to order an IID for all of the following:​

  • ​​All repeat OWI offenders

  • All first time OWI offenders with an alcohol concentration of 0.15 percent or higher

  • All drivers who refuse to provide a breath or blood sample for a chemical test at a traffic stop

How do I select the best IID and service center?

All approved IIDs have been evaluated by WisDOT to ensure that they meet all requirements established in Ch. Trans 313, Wisconsin Administrative Code. This includes:

  • Preventing a vehicle start if the user has a prohibited alcohol concentration
  • Measuring alcohol concentrations accurately and reliably under all circumstances
  • Verifying the device programming meets all specifications
  • Ensuring that the device provides the user with information about samples and service
  • Reviewing all data recorded in the device memory
  • Confirming that IID vendors and service providers meet all specified responsibilities 

WisDOT maintains a list of approved service centers online. This list is sorted by county and includes a breakdown of routine fees for each service center. 

How much does an IID cost?

The total cost of an IID varies among the vendors offering the IID services, but can be roughly estimated at $1,000 per year/per vehicle. The IID vendor may charge an installation fee which ranges from $0-$150. The IID lease and service agreement includes a monthly fee, generally $60-$90. There may be additional fees, which vary by vendor, for routine monitoring, recalibration, insurance, missed appointments, mobile service, security deposit, and vehicle switch. At the conclusion of the IID restriction a removal fee of $40-$60 may also be assessed. 


What happens if you do not comply with an IID order?

Failure to install an IID in each vehicle owned by the offender will result in a fine of $150-$600 and/or up to six months in jail at the court's discretion, plus a mandatory six-month extension of the IID order period. A second or subsequent violation within five years will result in fines up to $1,000.

What happens if you attempt to circumvent, disconnect, remove or tamper with the IID?

An IID will activate the vehicle's emergency lights and horn if any attempt to circumvent, disconnect, remove or tamper is detected. The event is also recorded in the device memory, and a violation reset will be immediately initiated. 

Ignition Interlock Device

An Ignition Interlock Device (IID) is a

mechanism installed in a vehicle to prevent drinking and driving. It requires the driver to blow into the device before the vehicle can be started. The breath sample taken by the device is analyzed and if the result is greater than the pre-programmed level, the device prevents the vehicle from being started. 

Intoxalock, Model 1001AConsumer Safety Technology877-262-6481
Interlock XTDraeger Safety800-332-6858
FC-100LifeSafer Interlock800-584-1226
SSI 20/20Smart Start800-880-3394

(920) 659-5500

Stock Photo. Posed by model.

OWI DUI Defense Attorney Paul C. Rohloff