#1 Ignition Interlock Device Provider at Sound Depot in Rolla

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.