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Ignition Interlock Device (IID) in Maryland

Maryland uses the term "DUI / DWI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense scope: 6 months (minimum participation in IID program). Confirm your actual notice and license status.

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Required for all DUI offenses

Quick Answer

Maryland requires IID for all DUI convictions through its IID program. Offenders may participate in the IID program to receive driving privileges during the suspension period. For repeat offenders, IID is mandatory for license reinstatement.

IID Duration by Offense

OffenseIID Duration
1st Offense6 months (minimum participation in IID program)
2nd Offense1 year
3rd Offense3 years
4th+ Offense3 years or longer

BAC threshold: Any DUI conviction (IID program available for 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

Maryland's IID program allows unrestricted driving with the device installed — no destination limitations. This is a significant benefit over the modified license without IID, which limits driving to work and essential errands.

Tampering / Circumvention Penalties

Tampering with an IID in Maryland is a misdemeanor carrying up to 1 year in jail and fines up to $1,000. The MVA may extend the IID requirement period.

Early Removal

Maryland does not allow early removal from the IID program.

Maryland-Specific Notes

Maryland distinguishes between DUI (BAC 0.08%+) and DWI (BAC 0.07-0.079%). Both can trigger IID requirements. Maryland's IID program is administered by the Motor Vehicle Administration (MVA). The program allows full driving privileges with IID, making it similar to California's approach.

Frequently Asked Questions

Is an IID required for a first DUI in Maryland?
Maryland's IID program is available for all DUI offenders who want driving privileges during suspension. Participation is voluntary for first offenders but provides full driving privileges. It is mandatory for repeat offenders.
How long do I need an IID in Maryland?
First offense: 6 months minimum. Second offense: 1 year. Third or more: 3 years.
How much does an IID cost in Maryland?
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 Maryland DMV, your IID provider, or a qualified DUI attorney in Maryland.
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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.