Smart Start Ignition Interlock

Sago’s Auto Sales
7055 US 61
Suite 67
Barnhart, MO 63012

#1 Ignition Interlock from $1.99/day*. Same-day installation available

Book your install now

Hours of Operation:

Day	1st Hour Block	2nd Hour Block
Sun	Closed
Mon	8:00am - 5:00pm
Tue	8:00am - 5:00pm
Wed	8:00am - 5:00pm
Thu	8:00am - 5:00pm
Fri	8:00am - 5:00pm
Sat	Closed

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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By providing your information and clicking “Book Your Install Now”, I authorize 1A Smart Start LLC and it’s franchisees’ to contact me at the phone number and/or email address above via phone, text, and/or email using multiple and periodic autodialed and prerecorded calls and texts for marketing purposes. Not a condition for purchase. Message and data rates may apply. To opt-out of texts, replay “STOP,” and to opt-out of emails click the email unsubscribe link.

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By providing my information and clicking “Book Your Install Now,” I authorize [Insert Legal Name of Franchisee, distributor, or affiliate] to contact me at the phone number above via phone and/or text using multiple and periodic autodialed and prerecorded calls and texts for marketing purposes. Not a condition for purchase. Message and data rates may apply. To opt-out of texts, reply “STOP”.

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Fast-Track Your Installation

Want to speed up the installation appointment process?
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Date of Birth

Drivers License #

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State Authority Name

Preferred Date

Preferences are subject to change based on availability.

Preferred Time

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This field is for validation purposes and should be left unchanged.

Or Call (636) 741-3179 Now!

¡O llame ahora al (636) 741-3179!

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 COSTS

3,000+ Locations - Same Day Install

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

FIND A LOCATION

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.

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

(833) 408-2512 More Details

Eastern Missouri Alternative Sentencing Services

481 Maple Street
Hillsboro, MO 63050

CLOSED – Opens at 9:00am Mo

Services at this Location:

(636) 649-3040 More Details

Community Services of Missouri

10904 Highway 21
Hillsboro, MO 63050

CLOSED – Opens at 9:00am Mo

Services at this Location:

(636) 793-0433 More Details

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

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Find a location near you!

Smart Start Ignition Interlock

Hours of Operation:

Services at this Location:

Book an Installation

Fast-Track Your Installation

Want to speed up the installation appointment process?
We can get you a quote faster if you fill out the information below.

Or Call (636) 741-3179 Now!

¡O llame ahora al (636) 741-3179!

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

3,000+ Locations - Same Day Install

Discreet, Easy-to-Use Devices

24/7 Knowledgeable State Program Experts

#1 Ignition Interlock Device Provider at Sago's Auto Sales in Barnhart

The Best Choice for Ignition Interlock Devices in Barnhart, Missouri

Frequently Asked Questions

Nearby Locations

Sago’s Auto Sales

Services at this Location:

Eastern Missouri Alternative Sentencing Services

Services at this Location:

Community Services of Missouri

Services at this Location:

Get Started

Locations

Support

Partners

Contact Us

Find a location near you!

Smart Start Ignition Interlock

Hours of Operation:

Services at this Location:

Book an Installation

Fast-Track Your Installation

Want to speed up the installation appointment process?We can get you a quote faster if you fill out the information below.

Or Call (636) 741-3179 Now!

¡O llame ahora al (636) 741-3179!

Why Choose Smart Start Ignition Interlock?

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

3,000+ Locations - Same Day Install

Discreet, Easy-to-Use Devices

24/7 Knowledgeable State Program Experts

#1 Ignition Interlock Device Provider at Sago's Auto Sales in Barnhart

The Best Choice for Ignition Interlock Devices in Barnhart, Missouri

Frequently Asked Questions

How much does an Ignition Interlock Device cost in Missouri? What are the fees?

What do I need to bring to my installation in Barnhart?

Where can I go for service? Anywhere, or just within my state?

How often does my IID need to be serviced in Missouri?

What constitutes a violation in Missouri?

How can I pay for calibration?

Nearby Locations

Sago’s Auto Sales

Services at this Location:

Eastern Missouri Alternative Sentencing Services

Services at this Location:

Community Services of Missouri

Services at this Location:

See What Everyone Says About Our Ignition Interlock

Get Started

Locations

Support

Partners

Contact Us

Want to speed up the installation appointment process?
We can get you a quote faster if you fill out the information below.