How Much Does It Cost To Have An Ignition Interlock Device Installed In My Car?

As with many things these days, the cost of something depends on where you live. So there is no simple answer to the question “How much does it cost to have an ignition interlock device installed in my car?” With an ignition interlock device (IID) installation, the cost not only depends on which state you live in, but it also depends on whether this was your first DUI/DWI offense or a repeat offense. If it’s a repeat offense, you will be required to have the ignition interlock device in your car for a longer period of time than if it’s your first offense. Some states require an IID for the first offense, but others don’t.

Generally speaking though, you can expect to pay roughly $2-$3 a day to lease your ignition interlock device. With ALCOLOCK and other companies, you don’t buy the IID — you lease it. Sometimes, you can take advantage of promotions such as free installation and free first month in some states. Removal of the device upon completion of your program is generally free. The bottom line is that you are financially responsible to pay for all the costs associated with installing an ignition interlock device in your vehicle.

You may want to check out our state laws page for more information on your state’s specific requirements regarding when you have to have an ignition interlock device installed in your vehicle, and for how long. . While we do our best to keep up with state regulations on our website, keep in mind that states are updating their laws all of the time. For the latest information in your state, your DUI lawyer and the courts will have the most current information as it pertains to your case.

Installation of an Ignition Interlock Device is Easy

Installation of an ignition interlock device is fairly simple. But it’s not a DIY sort of thing. State laws require that a state certified and authorized professional like install the device on your vehicle. ALCOLOCK has ignition interlock installation locations all over the United States. Your first step is to call or use our contact form to schedule your installation. Once we’ve confirmed your eligibility for your state’s program, we can usually get you an installation appointment within 48 hours. Installation is quick – generally around 1-2 hours, which includes training you in how to use the device. 

In a nutshell, an ignition interlock device is composed of two parts: the Electronic Control Unit (ECU) is hooked into your vehicle’s electrical system, or more specifically the starter. Then there is the handheld unit. The handheld unit is what you breathe into, so the device can detect your breath alcohol content (BAC). If your BAC is above the maximum set for your restricted driving program, the handheld unit communicates to the ECU, and the ECU disables the starter and prevents your vehicle from starting. If you pass the BAC test, you turn the key and your vehicle starts like normal.

Maintenance Visits

All states require you to bring your vehicle in monthly, so your service center can run a quick check and re-calibrate your device if necessary. During these visits, a technician will upload the monthly record to the agency or individuals monitoring your progress in your program. This may be the DMV or your probation officer, or both. You are also able to get a copy of your monthly report at any time. Your monthly report shows how many times you took the test, how many times you passed, how many times (if any) you failed the test, if you tried to skip a test, and more.

Since there is such a strict record of your interaction with the ignition interlock device, of course it is in your best interests to comply with all of your program requirements. Some programs will extend the amount of time you have to have the device in your vehicle if it’s shown that you are still trying to drink and drive.

To avoid accidentally failing your ignition interlock test, you may want to be sure that you haven’t used mouthwash, had an energy drink such as Red Bull or Monster, or had a meal with alcohol cooked into the food, such as a rum cake or pasta with vodka sauce. Your ignition interlock device is very sensitive to alcohol, and can detect the smallest amount. If you fail the test but you haven’t had any alcohol to drink, you will probably want to contact the person or agency monitoring your progress to let them know what happened.


At ALCOLOCK, we work with you as a team to help follow all the rules and regulations of your state’s restricted driving program. We want to help you get your full driving privileges back, so you can get your life back to normal. Call us at 866-700-9300 or use our contact form to schedule your ignition interlock device installation.

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