Smart Start Ignition Interlock
Sago’s Auto Sales7055 US 61
Suite 67
Barnhart, MO 63012
#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 Sago's Auto Sales in Barnhart
Located just South of the El Camino Real, or King's Highway is Barnhart, Missouri. Home to more than 5,600 residents. Roads like the El Camino Real were established when Spain inhabited colonial America. In Barnhart, this “King’s Highway” was first used in 1779. Now, Route 61 is the main thoroughfare that connects various cities in Missouri and other states. When the El Camino Real was first established, Ignition Interlocks were thing of the future. Today, however, this device can help make roads a safer place.
That’s why we’re proud to provide Ignition Interlock service to Barnhart, Missouri and the surrounding area. Our mission is to help drivers feel safer in places like Barnhart with Missouri’s leading Ignition Interlock Devices.
The Best Choice for Ignition Interlock Devices in Barnhart, Missouri
If you’ve got a DUI and need an Ignition Interlock Device (IID) in or around Barnhart, Smart Start leads the way. Our convenient program offers affordable costs, reliable Ignition Interlock service and a friendly, bilingual customer care team ready to answer questions 24/7/365.
You can schedule a convenient Ignition Interlock installation appointment at Sago’s Auto Sales in Barnhart. Call today to schedule your low-priced, Interlock installation at (636) 741-3179. You can also make an appointment through our online form.
Let the dedicated professionals provide quick installation that will get you back on the road quickly in Barnhart, Missouri or the surrounding area. You can find other convenient Smart Start locations in Farmington or St. Louis or throughout Missouri. Schedule your installation today!
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 Missouri:
- 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 Missouri 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 Missouri.
Ignition Interlock Device violation criteria can vary by state. Any and all of the following may constitute a violation in Missouri:
- 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 Missouri, 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
Sago’s Auto Sales
4568 Meramec Bottom Rd.
Saint Louis, MO 63128
CLOSED – Opens at 8:00am Mo
Services at this Location:
Installations, Calibrations
Eastern Missouri Alternative Sentencing Services
481 Maple Street
Hillsboro, MO 63050
CLOSED – Opens at 9:00am Mo
Services at this Location:
Sign Up, Manage Account, Informational Videos
Community Services of Missouri
10904 Highway 21
Hillsboro, MO 63050
CLOSED – Opens at 9:00am Mo
Services at this Location:
Sign Up, Manage Account, Informational Videos
See What Everyone Says About Our Ignition Interlock
Excellent TrustScore Rating
July 12, 2025
"The customer service rep was very kind and helpful to me. I would give her 10 stars if I could!"
Leanne C.
United States
July 12, 2025
"Very clear and helpful instructions."
Dagenais S.
United States
July 12, 2025
"Very professional and easy to understand. "
Raul R.
United States