California · DUI · Checked October 2026

Ignition Interlock Rules in California

Ignition Interlock Rules in California: What Are the Rules?

When California requires an ignition interlock after a DUI.

First offense: Court may order up to 6 months for a first DUI under § 23152; mandatory 12 months for a first DUI causing injury under § 23153; an interlock is also a condition of the first-offense restricted license
Repeat offenses: Mandatory 12 months (second), 24 months (third), 36 months (fourth or later) for § 23152; 24, 36 and 48 months for § 23153

Researched and checked by the DUI Help Editorial Team ·October 3, 2026

First Offense in California

Court may order up to 6 months for a first DUI under § 23152; mandatory 12 months for a first DUI causing injury under § 23153; an interlock is also a condition of the first-offense restricted license

Official source: first offense (California)

Repeat Offenses in California

Mandatory 12 months (second), 24 months (third), 36 months (fourth or later) for § 23152; 24, 36 and 48 months for § 23153

Official source: repeat offenses (California)

How the Program Works in California

Applies to offenses on or after January 1, 2019; section amended effective January 1, 2026

Official source: how the program works (California)

More on DUI Law in California

See the full overview of DUI laws in California and read about how ignition interlock programs work.

This page summarizes California law from official sources, checked October 2026. It isn't legal advice; a lawyer licensed in California can advise on your case.

Frequently Asked Questions

Is an Ignition Interlock Required for a First DUI in California?

Is an Interlock Required for Repeat Offenses?

Mandatory 12 months (second), 24 months (third), 36 months (fourth or later) for § 23152; 24, 36 and 48 months for § 23153

Sources

Ignition interlock