Smart Start Ignition Interlock

D&E Auto Inc
611 N 3rd Ave
Marshalltown, IA 50158

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

Or call (800) 831-3299

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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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¡O llame ahora al (800) 831-3299!

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.

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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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#1 Ignition Interlock Device Provider at D&E Auto Inc in Marshalltown

If you live near the Marshalltown, Iowa area and need an Ignition Interlock Device, Smart Start is your choice. It’s time to schedule your Ignition Interlock installation appointment at D&E Auto.

Since 1960, D&E Auto has been serving residents of Marshalltown, Iowa, and surrounding communities. In addition to Ignition Interlock, they offer affordable mechanical service with free estimates, as well as reasonably priced pre-owned vehicles that they inspect and service before selling. The shop is conveniently located at 611 North 3rd Avenue.

Let them get you back on the road today after a quality installation. Schedule your breathalyzer installation now by calling (800) 831-3299 or by filling out our online form. You can find additional Smart Start locations in Des Moines, Waterloo, Ames or throughout Iowa.

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 Iowa:

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 Iowa 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 Iowa.

Ignition Interlock Device violation criteria can vary by state. Any and all of the following may constitute a violation in Iowa:

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 Iowa, 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.

See What Everyone Says About Our Ignition Interlock

Excellent TrustScore Rating

December 13, 2025

"Great experience Extremely helpful thanks (: "

Maria C.

United States

December 13, 2025

"The rep was outstanding. She navigated the process for me providing excellent explanation and step by step assistance. The Rep was patient and a calming presence during the entire process. Thank You "

Cordell Ray.

United States