Why Your California License Stays Suspended After Interlock Installation

Your License Does Not Automatically Reinstate When You Install an Interlock Device

Installing an ignition interlock device in California does not lift your license suspension. The interlock is a requirement you must meet to eventually get your license back, but it is not the same as reinstatement. You install the device, drive on a restricted license for a set period (usually 5 months to 1 year depending on your offense), and then you file a separate request with the DMV to have your driving privileges restored.

The suspension stays in place until you complete the interlock period and the DMV processes your reinstatement request. Many drivers install the device and then assume they can drive normally again — this is a critical mistake that can result in a second suspension or criminal charges for driving on a suspended license.

Key Takeaways

Installing an interlock device satisfies one requirement for reinstatement, but does not end your suspension on its own.
You must drive on a restricted license during the interlock period, which lasts 5 months to 1 year depending on whether this is your first DUI offense.
After you complete the interlock period without violations, you must file a reinstatement request with the California DMV and pay a reinstatement fee.
Violations during the interlock period — such as blowing over the limit or tampering with the device — restart the clock and extend your suspension.
Driving without a valid license while your suspension is active carries criminal penalties separate from your original DUI case.

The Interlock Period and What It Requires

California law requires you to install an interlock device and drive on a restricted license for a minimum period before you can request reinstatement. The length of this period depends on your offense history. For a first DUI, the interlock period is typically 5 months. For a second DUI within 10 years, it is usually 1 year. For a third or subsequent DUI, the period is also 1 year.

During this time, you are not driving freely. You have a restricted license that allows you to drive only to work, school, medical appointments, court-ordered programs, and to the interlock service provider. You cannot drive for personal errands, social events, or any other purpose. The interlock device itself records every time you use your vehicle — the service provider sends these records to the DMV monthly.

The device requires you to blow into a mouthpiece before the engine starts. If your breath alcohol content is above the legal limit (typically 0.04 percent), the vehicle will not start. The device also requires rolling retests while you are driving, which means you must blow into it again at random intervals to prove you have not been drinking since you started the engine.

What Violations During the Interlock Period Mean

A violation during your interlock period restarts the entire clock. Violations include blowing over the limit, failing to take a rolling retest, missing a service appointment, tampering with or attempting to bypass the device, or driving a vehicle without an interlock installed. Any of these actions extends your suspension by the full interlock period again.

If you blow over the limit during the interlock period, the device records it. The service provider reports it to the DMV. The DMV then sends you a notice that your interlock period has been extended. You do not get a hearing or a chance to explain — the violation is automatic. If you miss a service appointment or fail to maintain the device, the same result occurs.

Tampering with the device — disconnecting it, having someone else blow into it, or trying to disable it — is a separate criminal offense in California. It can result in additional charges beyond your original DUI case. Driving a vehicle without an interlock during your restricted period is also a criminal offense and will result in a new suspension on top of your existing one.

How to Request Reinstatement After the Interlock Period Ends

Once you have completed your interlock period without violations, you must file a reinstatement request with the California DMV. You cannot straightforward stop using the interlock and assume your license is back. The DMV will not know your period is complete unless you tell them.

To request reinstatement, you must submit a form to the DMV — typically the SR 22 form (proof of financial responsibility) along with a letter from your interlock service provider confirming that you completed the period without violations. Some counties require you to file this request in person at the DMV office; others allow you to mail it. Check with your local DMV office or the interlock service provider to confirm the process for your county.

You must also pay a reinstatement fee. This fee varies by county but typically ranges from $100 to $300. The DMV will not process your reinstatement request without payment. Once the DMV receives your request, the fee, and proof of completion, they will process the reinstatement. This usually takes 2 to 4 weeks.

What Happens If You Drive Before Reinstatement Is Approved

Driving on a suspended license in California is a criminal offense. If you are stopped by law enforcement before your reinstatement is approved, you can be cited for driving with a suspended license. This is a separate charge from your original DUI and carries its own penalties, including fines, jail time, and an additional license suspension.

Even if you have installed the interlock and completed the required period, your license is still officially suspended until the DMV processes your reinstatement request and approves it. The interlock device does not change your legal driving status — it only satisfies the requirement that allows you to eventually request reinstatement.

If you receive a notice from the DMV that your reinstatement has been approved, you can then drive freely without the interlock. But until you receive that approval notice, you must continue to follow the restrictions of your suspended license and the interlock requirements.

Common Mistakes That Extend Your Suspension

The most common mistake is assuming the interlock period is over when you think it should be, rather than waiting for official confirmation from the DMV. Some drivers remove the device themselves or stop paying for service, thinking they have completed the requirement. This is a violation that restarts the clock.

Another mistake is driving a different vehicle without an interlock during the restricted period. Even if you are driving to an approved location like work, if the vehicle does not have an interlock installed, you are in violation. You must drive only the vehicle with the interlock, or you must have an interlock installed in any vehicle you drive.

Missing service appointments is also common. The interlock device requires regular maintenance and calibration. If you miss an appointment, the service provider reports it to the DMV as a violation. This extends your suspension even if you have done everything else correctly.

Finally, some drivers fail to file the reinstatement request promptly after completing the interlock period. There is no automatic reinstatement — you must take action. If you wait too long, you may face additional complications or your case may be closed, requiring you to start the process over.

Frequently Asked Questions

Can I drive to the interlock service provider during my suspension?

Yes. Driving to and from the interlock service provider for maintenance and calibration is one of the approved uses of your restricted license. Keep your appointment confirmation or receipt in case you are stopped by law enforcement. You should also keep documentation showing where the service provider is located.

What if I cannot afford the interlock device?

California law requires the interlock as a condition of driving during your suspension period. If you cannot afford it, you have the option to not drive during your suspension. Some service providers offer payment plans. Contact your local DMV office to ask about low-income information programs or sliding-scale providers in your area.

Do I need a lawyer to file my reinstatement request?

No. You can file the reinstatement request yourself by submitting the required documents and fee to the DMV. However, if your case is complex — for example, if you had violations during the interlock period — consulting with a DUI attorney may help you understand your options before filing.

What if I move to another state during my interlock period?

Your California suspension follows you. You must complete the interlock requirement in California before your license can be reinstated, even if you move. Some states have reciprocal agreements with California, but you cannot straightforward transfer your case to another state to avoid the interlock requirement.

How long does the DMV take to approve my reinstatement request?

Processing times vary by county, but typically take 2 to 4 weeks after the DMV receives your completed request, proof of interlock completion, and the reinstatement fee. During this time, your license is still suspended. Do not drive until you receive written approval from the DMV.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.