Ignition Interlock Device (IID) in Illinois
Illinois uses the term "DUI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense duration: Duration of suspension (typically 6-12 months). Monthly cost: $70-$115.
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Quick Answer
Illinois requires a Breath Alcohol Ignition Interlock Device (BAIID) for all DUI offenders who wish to drive during their statutory summary suspension period. The BAIID is not strictly mandatory — you can choose to not drive during the suspension — but it is required if you want driving privileges. For repeat offenders, IID is mandatory for reinstatement.
IID Duration by Offense
| Offense | IID Duration |
|---|---|
| 1st Offense | Duration of suspension (typically 6-12 months) |
| 2nd Offense | 5 years minimum (as condition of reinstatement) |
| 3rd Offense | 5 years minimum |
| 4th+ Offense | 5 years minimum (often longer by court order) |
BAC threshold: Any DUI (required for driving privileges during suspension); mandatory for all repeat offenders
IID Cost Breakdown in Illinois
| Item | Cost | Notes |
|---|---|---|
| Installation | $80-$150 | One-time fee. Takes about 1 hour. |
| Monthly Lease + Monitoring | $70-$115/mo | Includes device lease and monitoring. |
| Calibration | $25-$75 | Every 60 days. |
| Removal | $50-$100 | One-time fee when IID period ends. |
| Estimated Total (6 months) | $550-$940 | Install + 6 months lease + removal. |
| Estimated Total (12 months) | $970-$1,630 | Install + 12 months lease + removal. |
One-time
Lease + monitoring
Every 60 days
One-time
All-in estimate
All-in estimate
Approved IID Providers in Illinois
Contact providers directly for current pricing and service center locations in Illinois. Compare at least 2-3 providers before choosing — prices and service quality vary.
Restricted License with IID
Illinois issues a Monitoring Device Driving Permit (MDDP) for first offenders with BAIID installed. This allows unrestricted driving during the suspension period. Repeat offenders receive a Restricted Driving Permit (RDP) with BAIID that limits driving to specific purposes.
Tampering / Circumvention Penalties
Tampering with a BAIID in Illinois is a Class 4 felony for repeat offenders (1-3 years in prison) and a Class A misdemeanor for first offenders (up to 1 year in jail). Having someone else blow into the device is also a criminal offense.
Early Removal
Illinois does not allow early removal for first offenders. The BAIID must remain for the full suspension period. Repeat offenders must complete the full 5-year minimum.
Illinois-Specific Notes
Illinois uses the term BAIID (Breath Alcohol Ignition Interlock Device) instead of just IID. The state's MDDP program is unusual: first offenders with BAIID get unrestricted driving privileges (not limited to work/school), making it similar to California's approach. Illinois also has the Secretary of State's office (not DMV) handling driver's license issues.
Frequently Asked Questions
Is an IID (BAIID) required for a first DUI in Illinois?
What is an MDDP in Illinois?
How long do I need a BAIID in Illinois?
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