Newsweek
Californians convicted of driving under the influence (DUI) must make alterations to their vehicles in 2026 to comply with new laws aimed at reducing collisions on the roads.
Why It Matters
California's Department of Motor Vehicles (DMV) reports impaired driving as a major cause of severe crashes in California, making the program’s extension vital for safety. The law encourages safer driving habits and aims to address more than 1,300 yearly alcohol-impaired driving deaths, as cited by California's Office of Traffic Safety in figures updated July 2025.
What To Know
California drivers are being reminded by the state’s DMV of new traffic safety laws that took effect at the start of the year.
In one such measure, California has reinforced its strategy against drunk driving by expanding laws and regulations into 2026 that require certain drivers convicted of DUI to install a breath-activated device in their vehicles, known as the ignition interlock device (IID) program.
Under the new law, individuals convicted of DUI must install a breath test-connected IID in their vehicles. This device prevents the car from starting if alcohol is detected in the driver’s breath.
Lawmakers and safety officials say this measure is critical in reducing repeat offenses and saving lives on California’s roads, which remain impacted by alcohol-related fatalities.
The legislative update is shaped by Assembly Bill 366 (AB 366), which formally extends and intensifies the state’s IID requirements, initially launched under a pilot program, through January 2033.
Its expanded mandate eliminates discretion for judges and ensures every DUI offender is required to fit their personal vehicle with an IID as a condition for reinstating driving privileges.
Drivers must pass a breath alcohol test before the car can start, preventing operation by anyone over the legal alcohol limit.
According to NBC Palm Springs, law enforcement agencies are increasing efforts to ensure statewide compliance as the law takes effect in January 2026.
California’s DMV will continue to require proof of IID installation before reinstating a license after a DUI conviction, according to the department.
The 2026 law update coincides with stricter penalties for DUI-involved vehicular manslaughter (increased probation terms), the potential reduction of some felony DUI charges to misdemeanors before trial, and a broader move toward technology-based solutions in traffic enforcement.
The Law Offices of Kirk Tarman & Associates state that installation of an IID remains a primary requirement for most DUI cases.
What People Are Saying
Assemblywoman Cottie Petrie-Norris, a Democrat, who sponsored the bill, said in February 2025: "AB 366 will preserve our current protections and expand this mandate, ensuring that every individual convicted of a DUI must install an IID, eliminating the discretion that allows some offenders to avoid this critical safeguard."
The California Highway Patrol said in a December 26 news release that it is “committed to keeping the public informed so they can make the safest choices for themselves and their families.”
The DMV said when the pilot program launched: "Pursuant to state law, the DMV will conduct a Statewide IID Pilot Program that requires all repeat and all injury-involved DUI offenders to install an IID for a time period ranging from one to four years, depending on the number of prior DUI convictions. Offenders who install an IID may drive anytime or anywhere, as long as the vehicle is equipped with an IID."
What Happens Next
California’s expanded IID mandate puts the state at the forefront of technology-driven drunk driving prevention. Drivers convicted of DUI must expect not only the automatic IID installation orders, but also increased monitoring and enforcement from law agencies.