Often, yes. California requires an ignition interlock device, or IID, for many DUI convictions, and even when it isn't strictly mandatory, an IID is usually the fastest way to get back on the road after a suspension. It's a small breath tester wired to your ignition that stops the car from starting if it detects alcohol.
Whether an IID is required depends on the specifics. Repeat offenses and DUIs involving injury commonly carry a mandatory IID for a set period. For a first offense, an IID is often not strictly required for a short time, but installing one voluntarily is frequently the key to getting a restricted license so you can keep driving to work and school during the suspension. In practice, a lot of first offenders choose the IID because the alternative is not driving at all.
The device isn't free. You'll pay for installation and then a monthly rental and calibration fee for as long as it's required, which is part of the real cost of a DUI.
The length of the IID requirement varies by offense level and the outcome of your case. And if the underlying DUI gets reduced or challenged successfully, the IID picture can change with it.
Our ignition interlock page breaks down the rules and costs, and our license suspension page explains how the IID ties into keeping a restricted license.
Trying to keep driving after a DUI? Call (858) 622-7280 or visit our contact page.
This is general information, not legal advice, and every case is different.