New Stop-N-Swap Locations from Smart Start

Everything you need to know about our convenient Stop-N-Swap locations!

ONLY AVAILABLE IN MISSOURI

At Smart Start, we understand that your time is valuable.

That‘s why we’ve revolutionized the way you can replace your Ignition Interlock fuel cell module. With our patented FLEX-Cal technology that comes with our FLEX Ignition Interlock Device, the process is quick, simple, and hassle-free.

No other Ignition Interlock provider offers the level of convenience that Stop-N-Swap brings to the table.

It takes just a few minutes to complete the calibration process, allowing you to get back on the road swiftly and effortlessly. If you have any questions, feel free to reach out to us through our Customer Care Center. We’re here to assist you every step of the way.

How does Stop-N-Swap work?

Stop-N-Swap makes your monthly calibrations quick and easy! Once it’s time to exchange your fuel cell module, you will:

Drive to your nearest Stop-N-Swap location
You can find the Stop-N-Swap closest to you in the section below. Once you’ve arrived, the attendant will help you with the next steps.

Unlock your used module
The attendant will remove your module by unlocking the screw with a coin or a flat tool.

Swap for a new module
The attendant will take your vehicle odometer reading and license plate number. Once that’s done, you will pay the attendant for the new module and leave the used one behind.

Lock in your new module
You or the attendant will remove the new module from the package and place it on your device, aligning the plate evenly. Then, turn the screw back to the LOCKED position until it’s secure.

You’re ready to blow and go!
Provide a breath sample and start your car to make sure the device is ready to go.

Step-by-step video on how to replace your fuel cell module:

Watch More

Stop-N-Swap Frequently Asked Questions

Here are a few frequently asked questions about Stop-N-Swap locations and the FLEX device.

You will need to bring:

Your vehicle with the IID installed

A form of payment

The Stop-N-Swap attendant will take care of the rest!