North Carolina · DWI · Checked October 2026
Ignition Interlock Rules in North Carolina
Ignition Interlock Rules in North Carolina: What Are the Rules?
When North Carolina requires an ignition interlock after a DWI.
- First offense
- Only if BAC was 0.15 or more: for 1 year after restoration from a 1-year revocation
- Repeat offenses
- Yes if the prior offense was within 7 years: 3 years after a 4-year revocation, 7 years after a permanent revocation; also after habitual impaired driving or an Aggravated Level One sentence
First Offense in North Carolina
only if BAC was 0.15 or more: for 1 year after restoration from a 1-year revocation
Repeat Offenses in North Carolina
yes if the prior offense was within 7 years: 3 years after a 4-year revocation, 7 years after a permanent revocation; also after habitual impaired driving or an Aggravated Level One sentence
How the Program Works in North Carolina
DMV places the interlock restriction on the license at restoration; the driver may operate only an interlock-equipped vehicle and pays the cost (a partial cost waiver is available on a hardship affidavit). Any restored DWI license carries an alcohol restriction (0.04 after a first restoration, 0.00 after a second) for 3 years, or 7 years after a permanent revocation.
More on DWI Law in North Carolina
See the full overview of DWI laws in North Carolina and read about how ignition interlock programs work.
- North Carolina DWI Penalties: First, Second and Third Offense
- DWI License Suspension in North Carolina: Hearing Deadline and Hardship License
- proof of financial responsibility (insurer certificate or policy binder) Insurance After a DWI in North Carolina
- Can a DWI Be Expunged in North Carolina?
- Refusing a Breath or Blood Test in North Carolina
This page summarizes North Carolina law from official sources, checked October 2026. It isn't legal advice; a lawyer licensed in North Carolina can advise on your case.
Frequently Asked Questions
Is an Ignition Interlock Required for a First DWI in North Carolina?
only if BAC was 0.15 or more: for 1 year after restoration from a 1-year revocation
Is an Interlock Required for Repeat Offenses?
yes if the prior offense was within 7 years: 3 years after a 4-year revocation, 7 years after a permanent revocation; also after habitual impaired driving or an Aggravated Level One sentence