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Ignition Interlock Device (IID)

Installation of an ignition interlock device

Wisconsin courts are required to order an ignition interlock device (IID) to be installed on every vehicle owned by the offender for first offense OWI with an alcohol concentration of 0.15 or higher, for all second or subsequent OWI offense, and for chemical test refusal, unless doing so would cause an undue financial hardship.

IIDs are leased from a service provider for the duration of the vehicle sanction, a minimum of 12 months. The lease and service agreement includes fees for installation, monthly service, and removal at the conclusion of the sanction. Other fees may be assessed by the service provider for periodic calibration, violation resets, or permanent lockout conditions.

There are currently four IID models certified for use in Wisconsin:

  • Intoxalock (CST)
  • SSI 20/20 (Smart Start)
  • FC-100 (LifeSafer)
  • Interlock XT (Draeger)

Please see the following links for more information:

Frequently asked Questions about Wisconsin's IID Laws.
IID Service Centers in Wisconsin
IID Service Center Maps

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