Ignition Interlock Device (IID) in Iowa

Iowa uses the term "OWI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense scope: 1 year. Confirm your actual notice and license status.

Last updated: 2026-09-07

Required for all DUI offenses

Quick Answer

Iowa requires IID for all OWI (Operating While Intoxicated) convictions, including first offenses. The device is required for obtaining a temporary restricted license (TRL).

IID Duration by Offense

Offense	IID Duration
1st Offense	1 year
2nd Offense	1 year (after the revocation period)
3rd Offense	2 years
4th+ Offense	6 years

BAC threshold: Any OWI conviction (no BAC threshold — all offenders)

Confirm the device, provider and written quote

Check the responsible authority’s current approval information for the particular device and installer. Request the billing unit, included services, actual paid visit schedule, taxes, fees and removal terms in writing. Confirm financial assistance separately.

Add your own quoted charges in the IID worksheet. Unknown charges stay unknown; no local price or appointment count is assumed.

Restricted License with IID

Available

Iowa issues a temporary restricted license (TRL) with IID allowing driving to work, school, medical appointments, and treatment programs.

Tampering / Circumvention Penalties

Tampering with an IID in Iowa is a serious misdemeanor carrying up to 1 year in jail and fines. The restricted license is revoked and IID period is extended.

Early Removal

Iowa does not allow early removal of IID.

Iowa-Specific Notes

Iowa uses the term OWI (Operating While Intoxicated). The state requires IID for all offenders and has a particularly long 6-year requirement for fourth and subsequent offenses.

Frequently Asked Questions

Is an IID required for a first OWI in Iowa?

Yes. Iowa requires IID for all OWI convictions, including first offenses, for a minimum of 1 year.

How long do I need an IID in Iowa?

First and second offense: 1 year. Third offense: 2 years. Fourth or more: 6 years.

How much does an IID cost in Iowa?

Get a written quote for your vehicle and program. Confirm the billing period, included service, separately paid visits, taxes, state/program fees and removal charges. Verify any financial assistance before assuming a discount. A generic state price range is not your quote.

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Disclaimer: This is informational only, not legal advice. IID requirements, costs, and approved providers change frequently. Verify current requirements with the Iowa DMV, your IID provider, or a qualified DUI attorney in Iowa.

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Sources

NHTSA: interlock device and program background. This national reference does not verify every state rule above. Confirm the applicable law and current instructions with the authority named on your order or licensing notice.