Smart Start Ignition Interlock
Ultimate Car Audio721 Spring St
Paso Robles, CA 93446
#1 Ignition Interlock from $1.99/day*. Same-day installation available
Services at this Location:
- Installations
- Calibrations
Book an Installation
With the thousands of locations across the nation, 24/7 customer support, no hidden fees and the most reliable device on the market, Smart Start Ignition Interlock devices are hands-down the best way to get you back on the road fast.
Get a quick and easy IID installation with Smart Start! Get started today!
¡Obtenga una instalación rápida y fácil de IID con Smart Start! ¡Empieza hoy mismo!
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Why Choose Smart Start Ignition Interlock?
From $1.99/Day* - No Long-Term Contracts
Bi-weekly payment options designed to fit your budget.
IGNITION INTERLOCK COSTS3,000+ Locations - Same Day Install
Quick installs by skilled technicians at convenient U.S. locations.
FIND A LOCATIONDiscreet, Easy-to-Use Devices
Reliable, hygienic devices with guided tests and easy English-Spanish switching.
SMART START DEVICES24/7 Knowledgeable State Program Experts
Multilingual support trusted by over 1 million people, ready when you need us.
TALK TO A PROGRAM ADVISOR
#1 Ignition Interlock Device Provider at Ultimate Car Audio in Paso Robles
Smart Start is your No. 1 choice in Paso Robles for the best Ignition Interlock Devices. We offer low costs and reliable service. Our knowledgeable customer care team is also ready to answer your questions around the clock.
So, schedule an Ignition Interlock installation appointment at Ultimate Car Audio. You’ll get back on the road quickly with outstanding breathalyzer installation. The shop is conveniently located on Spring Street.
It’s time to schedule your Ignition Interlock installation! Call (805) 769-9080 or fill out our online form. Look for other convenient Smart Start locations in Paso Robles, San Luis Obispo, or throughout California. You can trust Smart Start to provide your Ignition Interlock service!
Frequently Asked Questions
The overall cost of an Ignition Interlock Device is a combination of installation fees, monthly service fees, and removal fees. Exact pricing varies by state. To get a quote today, call (800) 831-3299 to speak with a friendly Program Advisor.
Once you have scheduled your Ignition Interlock Device (IID) installation with Smart Start, you will need to bring the following to your IID installation appointment in California:
- Two valid forms of identification—one of which should include a photo of you.
- Proof of residence.
- Any and all court documents that may be relevant to your Ignition Interlock Device requirement or your restricted driving period.
- Vehicle registration. If you do not own the vehicle on which you’re installing the Ignition Interlock Device, or if that vehicle is not registered to you, you will need to bring a letter of permission from the registered owner stating that you are allowed to install an Ignition Interlock Device on the vehicle.
- The vehicle on which you’ll be installing an Ignition Interlock Device (IID).
If you have any additional questions or concerns about the installation process or what is required for a successful installation, please don’t hesitate to call our customer care team at (800) 831-3299. You can also click on the chat window below to begin a discussion with one of our customer care advocates.
You may be able to service your Ignition Interlock Device at any Smart Start service center nationwide. However, we strongly suggest checking with your state authority in California before seeking service outside of your state. Find the nearest Smart Start service center here.
Typically, you will need to service your Ignition Interlock Device (IID) once every 30-60 days or as determined by your jurisdiction in California.
Ignition Interlock Device violation criteria can vary by state. Any and all of the following may constitute a violation in California:
- A skipped rolling retest
- Tampering with the Ignition Interlock Device in any way
- Any breath sample that registers a BrAC above .02 percent
- Missing your scheduled IID service appointment
Learn more about Ignition Interlock Device violations.
In California, you can pay for your Interlock Device calibration via credit card at the Smart Start service center at the time of calibration or via the online Client Portal.
Nearby Locations
ULTIMATE CAR AUDIO
545 - 12TH ST
Paso Robles, CA 93446
CLOSED – Opens at 9:00am Mo
Services at this Location:
Sign Up, Manage Account, Informational Videos
Tire King & Auto Express
112 1st St
King City, CA 93930
CLOSED – Opens at 9:00am Su
Services at this Location:
Installations, Calibrations
Atlas Custom Sound
908 N Broadway
Santa Maria, CA 93454
CLOSED – Opens at 9:00am Mo
Services at this Location:
Installations, Calibrations
See What Everyone Says About Our Ignition Interlock
Excellent TrustScore Rating
November 8, 2025
"Priscilla was helpful, informative, & thorough. Wish she was the representative whenever I get to call an important number. "
Kelsey W.
United States
November 8, 2025
"Very knowledgeable, helpful and pleasant experience with the customer service representative Terry, who took my initial call. Prompt appointments available, top notch customer service from a knowledgeable installation technician at Diamond Audio. They have helped make a non pleasant requirement a bit brighter. "
Cheryl C.
United States
November 8, 2025
"Was good experience!"
Daniel G.
United States




