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Certified Ignition Interlock
in Missouri

Book Now to Save Up to $200+

Mention code FREE23MO to claim your offer!

Fill out the form or call (833) 656-2831 to get back on the road today.

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Missouri-Approved Ignition Interlock Device

Smart Start is proud to partner with the Missouri Department of Transportation to offer easy-to-use devices with competitive pricing. We are offering a promotion with no monthly lease payments until 2024! Use promo code FREE23MO to save up to $200!

If you’re in search of a Missouri Ignition Interlock Device, Smart Start is a reliable choice. Another Ignition Interlock provider recently faced suspension within Missouri.

Smart Start remains one of the trusted and certified providers that have consistently met Missouri’s requirements. Being certified means that every device we install is accurate, dependable, and equipped with the latest technology.

The following list of certified providers for Ignition Interlock Devices in Missouri has been updated as of 10/2023.


  • Smart Start
  • RoadGuard
  • LifeSafer
  • Alcohol Detection Systems (ADS)


  • Intoxalock

+Offer ends 12/31/23 (11:59 PM, CST). To qualify for this promotion, you must mention code FREE23MO, be a Missouri resident, and have a Smart Start branded Ignition Interlock Device installed on or before 12/31/23. Savings are based on having no monthly lease payment until January 2024. Actual savings may vary depending on lease terms. Monthly Lease payments will be waived until January 1, 2024. After this date, the regular monthly lease fee will apply. May not be combined with other offers. Not redeemable for cash or adjustments to prior leases or purchases.

Missouri Ignition Interlock: We're Always Here for You

If you’re searching for a car breathalyzer after a DWI or DUI offense, we offer the best Ignition Interlock Device in Missouri. We will help you successfully complete your car breathalyzer requirement with support from caring, compassionate specialists who understand everything you need to know about Ignition Interlock in Missouri.

We’ll be with you right from the beginning with the services and support you need. The cheapest Missouri Ignition Interlock Device, includes 24/7/365 Customer Care that makes your Ignition Interlock experience as easy as possible.

Trust Smart Start and schedule an installation appointment for your motor vehicle today at any of our Missouri service centers.

Ignition Interlock Locations in Missouri

Let's get started with an installation in Missouri that fits your schedule, at one of the convenient locations below.

How much does an Ignition Interlock Device cost
in Missouri

At Smart Start, we understand the challenges that come with a DUI, and that’s why we provide an affordable and user-friendly IID option to support your successful completion of the Interlock program. Visit our Missouri IID cost page to learn more.

Laws, Forms, and FAQs in Missouri

Want more information about Ignition Devices in Missouri? Smart Start’s got you covered with pages about your state laws, forms, and other Interlock Frequently Asked Questions.


Why Choose Smart Start in Missouri?

No equipment to buy. No hidden charges. No long-term contracts.

We offer the best Ignition Interlock Devices at the lowest price. Every Missouri driver with a DWI or DUI offense can become knowledgeable of our costs from beginning to end, with no high pressure or double-talk.

Fast, convenient installation. Get an appointment that fits your schedule.

We’ll find a service center near you, often with a same-day appointment. Our specially trained technicians are committed to customized, quality installation.

Old, new, gas, electric, high performance, or low profile. We install on all.

Whether you’re driving an older vehicle or the latest electric model, there’s nothing our technicians can’t handle. Our Missouri Ignition Interlock Devices are the perfect fit for whatever motor vehicle you are driving..

Small, discreet, easy to use. Ignition Interlock shouldn’t be difficult.

Our attractive and handheld Missouri Ignition Interlock Device is about the size of a cellphone, with an intuitive keypad and display. You’ll get hands-on training to make sure that it’s easy to blow and go.

Quick calibration. Easy service. More drive-through locations than anyone.

Missouri law will require your Ignition Interlock Device to be serviced and calibrated on a regular basis. Our calibration appointments usually take about 15 minutes at any location that’s handy for you.

Flexible payment options. Easy autopay. Take advantage of our Client Portal.

Everyone’s budget is different. That’s why we offer weekly, monthly, or bi-monthly payments, plus an autopay option. Set it up through our Client Portal app (or go online).

You’ve got questions. We’ve got answers. 24/7/365 multilingual Customer Care.

There’s always somebody who can help when you have a question about your car breathalyzer, your account, monitoring laws, or anything else with your Missouri Interlock Device.

Excellent TrustScore of 4.7 out of 5