Iowa · OWI · Checked October 2026

Ignition Interlock Rules in Iowa

Ignition Interlock Rules in Iowa: What Are the Rules?

When Iowa requires an ignition interlock after an OWI.

First offense
Required for a temporary restricted license after a first offense
Repeat offenses
Required for a temporary restricted license and for 1 year from reinstatement after a second or subsequent revocation (reduced by time held on a TRL)

Researched and checked by the ·

First Offense in Iowa

required for a temporary restricted license after a first offense

Official source: first offense (Iowa)

Repeat Offenses in Iowa

required for a temporary restricted license and for 1 year from reinstatement after a second or subsequent revocation (reduced by time held on a TRL)

Official source: repeat offenses (Iowa)

How the Program Works in Iowa

Approved devices only; tampering or circumventing a required device is a serious misdemeanor.

Official source: how the program works (Iowa)

More on OWI Law in Iowa

See the full overview of OWI laws in Iowa and read about how ignition interlock programs work.

This page summarizes Iowa law from official sources, checked October 2026. It isn't legal advice; a lawyer licensed in Iowa can advise on your case.

Frequently Asked Questions

Is an Ignition Interlock Required for a First OWI in Iowa?

required for a temporary restricted license after a first offense

Is an Interlock Required for Repeat Offenses?

required for a temporary restricted license and for 1 year from reinstatement after a second or subsequent revocation (reduced by time held on a TRL)

Sources

  1. Ignition interlock

dui.help is an independent guide, not a law firm or a government agency, and doesn't give legal advice. For advice on your case, talk to a lawyer licensed in your state; your state bar can refer you, and if you can't afford a lawyer, ask the court about a public defender.