Ignition Interlock Device (IID) in California
California uses the term "DUI" for impaired driving offenses. IID requirement: required for all dui offenses. First offense duration: 4 months (6 months if BAC was 0.15%+). Monthly cost: $60-$100.
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Quick Answer
California requires IID for all DUI convictions statewide since January 2019. The device is mandatory for first offenses and above. IID installation allows unrestricted driving privileges during the suspension period rather than a limited restricted license.
IID Duration by Offense
| Offense | IID Duration |
|---|---|
| 1st Offense | 4 months (6 months if BAC was 0.15%+) |
| 2nd Offense | 1 year |
| 3rd Offense | 2 years |
| 4th+ Offense | 3 years |
BAC threshold: Any DUI conviction (no BAC threshold — all offenders)
IID Cost Breakdown in California
| Item | Cost | Notes |
|---|---|---|
| Installation | $70-$150 | One-time fee. Takes about 1 hour. |
| Monthly Lease + Monitoring | $60-$100/mo | Includes device lease and monitoring. |
| Calibration | $25-$75 | Every 60 days. |
| Removal | $50-$100 | One-time fee when IID period ends. |
| Estimated Total (6 months) | $480-$850 | Install + 6 months lease + removal. |
| Estimated Total (12 months) | $840-$1,450 | Install + 12 months lease + removal. |
One-time
Lease + monitoring
Every 60 days
One-time
All-in estimate
All-in estimate
Approved IID Providers in California
Contact providers directly for current pricing and service center locations in California. Compare at least 2-3 providers before choosing — prices and service quality vary.
Restricted License with IID
With IID installed, California DUI offenders can drive anywhere with no restrictions (not limited to work/school). This is a significant benefit over the old restricted license program that only allowed driving to specific locations. The IID effectively replaces the restricted license — you get full driving privileges.
Tampering / Circumvention Penalties
Tampering with or circumventing an IID in California is a misdemeanor under Vehicle Code 23247, punishable by up to 6 months in jail and fines. Having someone else blow into the device is also a crime for both parties. The IID requirement period is extended and driving privileges may be revoked.
Early Removal
California does not allow early removal. The full IID period must be served. Compliance must be verified by the IID provider before removal is authorized by the DMV.
California-Specific Notes
California handles more DUI cases than any other state (~150,000 DUI arrests per year). The 2019 statewide IID mandate replaced a patchwork of county-level pilot programs. The key benefit: IID installation allows full (unrestricted) driving privileges during the suspension period, which is a strong incentive to install quickly. California also has a dual-track system where the DMV suspension runs separately from the criminal court case.
Frequently Asked Questions
Is an IID required for a first DUI in California?
Can I drive anywhere with an IID in California?
How much does an IID cost in California?
What if I can't afford an IID in California?
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