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Fast-Track Your Installation

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Or Call (800) 831-3299 Now!

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Schedule an Interlock Device Installation in Modesto

Ride with Smart Start
& get back on the road

California’s #1 Ignition Interlock Program
Low-price, with no hidden fees
Fast installation with same-day available
24/7/365 Customer Care – Se hablamos Español

It only takes a moment to get your personalized quote.

Call Now! (800) 831-3299

Ignition Interlock in Modesto: We're Always Here for You

From $1.99/Day* - No Long-Term Contracts

Bi-weekly payment options designed to fit your budget.

Ignition interlock Costs

3,000+ Locations - Same Day Install

Quick installs by skilled technicians at convenient U.S. locations.

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Discreet, Easy-to-Use Devices

Reliable, hygienic devices with guided tests and easy English-Spanish switching.

Smart Start devices

24/7 Knowledgeable State Program Experts

Multilingual support trusted by over 1 million people, ready when you need us.

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Ignition Interlock Locations in Modesto, California

Let’s get started with an installation for an Ignition Interlock in California that fits your schedule, at one of the convenient locations below.

Car Audio Depot

3012 McHenry Ave
Ste A
Modesto, CA 95350

CLOSED – Opens at 9:00am

View Store Information Schedule An Install
(833) 407-3448 Get Directions
Top Flight Insurance

901 N Carpenter Road
Ste 37
Modesto, CA 95351

CLOSED – Opens at 9:00am

View Store Information Schedule An Install
(209) 446-5111 Get Directions
Car Audio Warehouse

1249 N Golden State Blvd
Turlock, CA 95380

CLOSED – Opens at 9:00am

View Store Information Schedule An Install
(209) 427-3615 Get Directions
Stereos Plus Accessories

325 W 16th St
Merced, CA 95340

CLOSED – Opens at 9:00am

View Store Information Schedule An Install
(209) 205-4098 Get Directions
Express Car Audio

1016 W Hammer Ln
Stockton, CA 95209

CLOSED – Opens at 9:00am

View Store Information Schedule An Install
(209) 205-4099 Get Directions
Walts Auto Repair

1325 Angie Ave
Modesto, CA 95351

View Store Information Schedule An Install
(209) 857-3997 Get Directions

Ignition Interlock in California: We're Always Here for You

If you’re searching for a car breathalyzer after a DUI offense, we offer the best Ignition Interlock Device in Modesto, California. We will help you successfully complete your car breathalyzer requirement to help you regain your full driving privilege. You’ll have the support from caring, compassionate specialists who understand everything you need to know about a California Ignition Interlock.

However, you’ll be getting more than just an Ignition Interlock Device. We’ll be with you right from the beginning with the services and support you need. Our Ignition Interlock program includes 24/7/365 Customer Care that makes your Ignition Interlock system as easy as possible.

Schedule an installation appointment now at Modesto, California, or at any of our nearby service centers.

(800) 831-3299

The Most Discreet Ignition Interlock Devices in Modesto, California

Smart Start’s car breathalyzers were designed to be court compliant while keeping the user’s needs in mind. We understand the desire for privacy during this difficult time, so our Ignition Interlock Device is small and discreet.

The black exterior allows you to conceal it easily in your motor vehicle, but size doesn’t dictate function! Our Ignition Interlock Device can read your alcohol-free test in less than one second, so you can get back on the road quickly.

The Best Customer Care

When you choose the cheapest Ignition Interlock Device, you’re choosing the 24/7 bilingual support of our Customer Care Center and the expertise of our local technician teams. Call (800) 831-3299 or complete the form at the top of this page to enlist Smart Start as your program partner. We’ll put the wheel back in your hands.

(800) 831-3299

Questions about Ignition Interlock Devices in Modesto, California

How do I get my IID calibrated in Modesto?

Calibration is required regularly to ensure your IID is working properly. In Modesto, we offer convenient service appointments to calibrate your device. The frequency of calibration is defined by California regulations. Generally, every 30-90 days.

Can I get same-day Interlock Device installation in Modesto?

Yes! Smart Start offers same-day installation appointments at many of our Modesto-area locations, subject to availability. We understand the urgency of meeting program deadlines, so we work to accommodate your schedule and get you back on the road as quickly as possible.

Where can I get an Ignition Interlock Device installed in Modesto, California?

Smart Start offers several convenient installation locations throughout Modesto and the surrounding areas. Our local service centers are staffed by experienced technicians who provide fast, professional installations. To find a location near you, visit our location finder or call our 24/7 Customer Care team for assistance.

How much does an Ignition Interlock Device cost in Modesto?

Smart Start offers affordable Ignition Interlock solutions in Modesto. See our Interlock Device cost guide for California to learn more.

How does an Ignition Interlock Device work?

An Ignition Interlock Device (IID) prevents a vehicle from starting if it detects alcohol on the driver’s breath. The driver blows into the device, and if their breath alcohol content is below the programmed limit, the car will start. You’ll also have to complete periodic retests after starting your vehicle to ensure continued compliance. Learn more about how IIDs work with our complete guide.

What are California’s IID laws?

In California, an Ignition Interlock Device (IID) may be required after a DUI. See our complete guide for information on IID laws and more in California.

See What Everyone Says About Our Ignition Interlock

Excellent TrustScore Rating

January 14, 2026

"Honestly I was bitter at first. But that was because of my own issues with it being mandatory. Other than watching the price rise dramatically, I think smart start is a thorough company that truly separates drinking from driving.I think every car on the road should have one. I recently had one reinstalled into my new truck to do the final 4 months. Shauna was excellent. I was able to get it installed the same day. She was intelligent and professional and went the extra mile to make sure I was content and even gave me a break on something that im sure she didn't have to. Once I settled in and grew up, the company grew on me and I was able to see it for more than the nuisance it had began with."

Michael Charles Irwin.

United States

January 14, 2026

"The last was very helpful "

Edwin E.

United States

January 14, 2026

"Itzel was very helpful and professional. Made the process easy and also helped me expedite my appointment. Excellent service! "

Brian M.

United States

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