Ignition Interlock Device (IID) in North Carolina
North Carolina uses the term "DWI" for impaired driving offenses. IID requirement: required for high bac or repeat offenses. First offense duration: 1 year (only if Level 1 or Aggravated Level 1). Monthly cost: $60-$95.
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Quick Answer
North Carolina requires IID for DWI convictions at aggravated Level 1 or Level 1 punishment, which includes high BAC (0.15%+) and repeat offenders. Standard first-offense DWI at lower levels does not require IID.
IID Duration by Offense
| Offense | IID Duration |
|---|---|
| 1st Offense | 1 year (only if Level 1 or Aggravated Level 1) |
| 2nd Offense | 3 years |
| 3rd Offense | 7 years |
| 4th+ Offense | Court-determined (may be permanent) |
BAC threshold: 0.15% BAC or Level 1 / Aggravated Level 1 punishment; all repeat offenses
IID Cost Breakdown in North Carolina
| Item | Cost | Notes |
|---|---|---|
| Installation | $70-$150 | One-time fee. Takes about 1 hour. |
| Monthly Lease + Monitoring | $60-$95/mo | Includes device lease and monitoring. |
| Calibration | $25-$65 | Every 60 days. |
| Removal | $50-$100 | One-time fee when IID period ends. |
| Estimated Total (6 months) | $480-$820 | Install + 6 months lease + removal. |
| Estimated Total (12 months) | $840-$1,390 | Install + 12 months lease + removal. |
One-time
Lease + monitoring
Every 60 days
One-time
All-in estimate
All-in estimate
Approved IID Providers in North Carolina
Contact providers directly for current pricing and service center locations in North Carolina. Compare at least 2-3 providers before choosing — prices and service quality vary.
Restricted License with IID
North Carolina allows a limited driving privilege with IID for eligible offenders.
Tampering / Circumvention Penalties
Tampering with an IID in North Carolina is a Class 1 misdemeanor carrying up to 120 days in jail.
Early Removal
North Carolina does not allow early removal.
North Carolina-Specific Notes
North Carolina has very long IID requirements for repeat offenders: 3 years for second, 7 years for third. The state uses a 5-level sentencing system for DWI (Levels 1, 2, 3, 4, 5 from most to least severe). IID is primarily required at the most severe levels.
Frequently Asked Questions
Is an IID required for a first DWI in North Carolina?
How long do I need an IID in North Carolina?
How much does an IID cost in North Carolina?
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