Ignition Interlock Device (IID) in Tennessee
Tennessee uses the term "DUI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense duration: 1 year. Monthly cost: $60-$95.
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Quick Answer
Tennessee requires IID for all DUI convictions, including first offenses. The device is mandatory as a condition of receiving a restricted license.
IID Duration by Offense
| Offense | IID Duration |
|---|---|
| 1st Offense | 1 year |
| 2nd Offense | 2 years |
| 3rd Offense | 3 years |
| 4th+ Offense | 5 years |
BAC threshold: Any DUI conviction (no BAC threshold — all offenders)
IID Cost Breakdown in Tennessee
| 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 30 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 30 days
One-time
All-in estimate
All-in estimate
Approved IID Providers in Tennessee
Contact providers directly for current pricing and service center locations in Tennessee. Compare at least 2-3 providers before choosing — prices and service quality vary.
Restricted License with IID
Tennessee issues a restricted license with IID for driving to work, school, medical appointments, and court-ordered programs.
Tampering / Circumvention Penalties
Tampering with an IID in Tennessee is a Class A misdemeanor carrying up to 11 months and 29 days in jail and fines up to $2,500.
Early Removal
Tennessee does not allow early removal.
Tennessee-Specific Notes
Tennessee requires IID for all DUI offenders and has relatively standard durations. The state requires monthly calibration, which is more frequent than some states.
Frequently Asked Questions
Is an IID required for a first DUI in Tennessee?
How long do I need an IID in Tennessee?
How much does an IID cost in Tennessee?
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