Ignition Interlock Device (IID) in Louisiana

Louisiana uses the term "DWI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense scope: 12 months. Confirm your actual notice and license status.

Last updated: 2026-09-07

Required for all DUI offenses

Quick Answer

Louisiana requires IID for all DWI convictions, including first offenses. The device is required as a condition of receiving a hardship license or restricted driving privileges.

IID Duration by Offense

Offense	IID Duration
1st Offense	12 months
2nd Offense	24 months
3rd Offense	36 months
4th+ Offense	Lifetime IID requirement

BAC threshold: Any DWI 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

Louisiana issues a hardship license with IID for essential driving to work, school, and medical appointments.

Tampering / Circumvention Penalties

Tampering with an IID in Louisiana carries additional fines, jail time, and extension of the IID period. Repeat tampering may result in felony charges.

Early Removal

Louisiana does not allow early removal. Fourth or subsequent offenders face a lifetime IID requirement.

Louisiana-Specific Notes

Louisiana has a lifetime IID requirement for fourth and subsequent DWI offenders — one of the harshest in the nation. The state also requires IID calibration every 30 days, more frequently than most states.

Frequently Asked Questions

Is an IID required for a first DWI in Louisiana?

Yes. Louisiana requires IID for all DWI convictions, including first offenses, for 12 months.

How long do I need an IID in Louisiana?

First offense: 12 months. Second offense: 24 months. Third offense: 36 months. Fourth or more: lifetime.

How much does an IID cost in Louisiana?

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 Louisiana DMV, your IID provider, or a qualified DUI attorney in Louisiana.

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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.