Frequently Asked Questions About Ignition Interlock Devices

Get answers to common questions about ignition interlock devices (IIDs). Intoxalock is the leadingIID provider in the U.S., offering 24/7 support through web chat, or call us at 888-283-5899.

If you’re an existing customer, manage your account easily via the Intoxalock Mobile App or MyAccount. Need help using your device? Visit our how-to videos page.

We’re here to support you every step of the way.

Understanding the Basics of IIDs

What is an ignition interlock device (IID)?

An ignition interlock device (IID) is a car breathalyzer system installed in your vehicle to prevent a car from starting if alcohol is detected on the driver’s breath and may be required following a DUI violation. The IID device includes a mouthpiece for breath sampling, a handheld unit that measures breath alcohol content (BrAC), and a cord connecting the system to your vehicle’s ignition.

Want to know more about how an IID works? Watch our video

Can I voluntarily install an IID?

Yes, you can to help ensure safe driving and prevent potential DUI incidents. Often, those who struggle with sobriety or their family members will opt to install a voluntary interlock device to prevent a DUI or repeat DUI. Intoxalock offers special pricing for voluntary IID installations.

Call us today at (844) 899-6211 to learn more about voluntary interlock device options and take a proactive step in preventing DUIs.

When do I need an interlock ignition device?

In most states, an IID is required for drivers arrested for or convicted of a DUI or DWI before they can legally drive again. The specific timing for IID installation varies by state, so it’s important to review your state regulations.

Need help understanding your state’s IID requirements? Speak to one of our State Specialists at (844) 899-6211 or fill out a form below.

Are ignition interlock devices effective in preventing drunk driving?

Ignition interlock devices are extremely effective in preventing repeat drunk driving offenses. They are endorsed by organizations like Mothers Against Drunk Driving (MADD) and the National Highway Traffic Safety Administration (NHTSA). Strict ignition interlock laws have saved countless numbers of lives across the country.

Explore more about the impact of IID programs on road safety.

Are ignition interlock devices held to any quality standards?

All ignition interlocks must meet National Highway Traffic Safety Administration (NHTSA) standards and comply with state-specific regulations. Intoxalock devices are rigorously tested and approved by each state in which Intoxalock operates.

How does an ignition interlock device work?

The IID measures your Breath Alcohol Content (BrAC) to ensure it’s below the legal limit set by your state. To start your vehicle, you’ll need to blow, inhale, and blow again into the device’s mouthpiece as explained by your an installer technician. Once the vehicle is in motion, the device will ask for random retests to ensure the continued absence of alcohol.

Want to learn more about how the blow pattern works? Find out here.

How do I choose an ignition interlock provider?

When selecting an interlock provider, ensure they are certified in your state, offer convenient locations, and provide excellent customer service. Choosing a reliable IID provider can make the process smoother and help you stay compliant with state laws. You may use this device multiple times daily, so you’ll be glad if you choose a device that’s easy to use and can be serviced at a nearby location. Read more about why Intoxalock is an industry leading ignition interlock provider.

Ready to get your IID? Call an Intoxalock State Specialist at (844) 899-6211 or fill out a form below!

Installing an Ignition Interlock in a Vehicle

Can I drive my car to the service center for installation?

Yes, you can drive your car to the service center for installation unless your license is restricted or suspended. If you’re under a driving restriction, you may need to arrange for someone else to drive your vehicle or have it towed to your service location.

Learn What to Expect During Your Ignition Interlock Installation Appointment

Can an Intoxalock IID be installed on a motorcycle?

Currently, Intoxalock IIDs are not designed for use on motorcycles. The devices are intended for installation in cars, trucks, and other standard vehicles.

Will an IID cause damage to my car?

No, Intoxalock IIDs are installed by trained professionals using methods that should not cause damage to your vehicle. The installation process is designed to be safe and reversible, ensuring your car remains in good condition. It is critical to choose an interlock provider with highly trained technicians. At Intoxalock, each installer is trained and certified, and their work is held to high standards to protect your vehicle.

How long will my IID installation take?

The installation of an ignition interlock device typically takes about one to four hours, depending on your vehicle type and the complexity of the installation. Intoxalock service centers work efficiently to get you back on the road as quickly as possible. Let your Intoxalock representative know if you drive an electric-powered vehicle or hybrid to get a more accurate time and cost estimate.

What should I consider when picking an installation location?

When choosing a service center for your IID installation, consider the location's proximity, the availability of appointments, and the quality of service. Intoxalock has the largest network of interlock service centers in the U.S., making it easy to find a convenient location. Your Intoxalock State Specialist may have recommendations for your area, or you can browse Intoxalock’s locations online.

Find an Intoxalock service center near you

What information should I receive at my IID installation appointment?

At your IID installation appointment, you should receive instructions on how to use your IID, a demonstration of how to submit a breath sample, and details on maintenance and calibration requirements. You will also be provided with any necessary documentation, such as a Certificate of Installation. You can also log in to MyAccount to view your lease agreement, user’s manual and more at any time.

Is the car breathalyzer protected if my vehicle is damaged?

Your Intoxalock IID is installed securely within your vehicle. In the event of an accident, the device is designed to withstand impacts and continue functioning unless the vehicle is severely damaged. In the event of theft, a severe traffic accident or natural disaster, your Intoxalock IID will not be automatically protected unless you have added our comprehensive Device Protection Plan to your account.

We encourage all customers to add IID device protection because you never know when your vehicle and IID could be damaged. It can cost you thousands to replace the interlock device and system. For under $10 per month, your device will be protected against natural disasters, theft, life’s unexpected accidents, and more.

Call Intoxalock at (844) 899-6211 to add device protection to your lease.

Using an Ignition Interlock Device

What happens if I fail the breath test when I am trying to start my car?

If you fail the breath test, your car won’t start. You may continue to submit samples as prompted. Multiple failed attempts can result in a temporary lockout, requiring you to wait before trying again, or a service lockout that will necessitate a visit to a service center.

Learn more about failed breath tests.

If someone else blows into my IID and fails, am I responsible?

Yes, if someone else blows into your IID and fails, you are still held responsible for that breath sample. Be cautious about who you allow to drive your vehicle and use your ignition interlock device. Be aware that many states now require interlock devices with cameras to verify who is driving and who is using the IID.

Can I leave my vehicle running if I’m not in it while the IID is installed?

No, you should not leave your vehicle running while unattended with an IID installed. Ignition interlock device random retests are required by state law and can occur at random intervals while the engine is on. Before exiting, always turn off your vehicle and ensure no retest prompts are pending. Failing to complete a retest can lead to penalties, depending on your state's interlock compliance guidelines.

Can I start my vehicle without blowing in the car breathalyzer?

No, you must provide a clean breath sample to start your vehicle. Ignition interlock devices are designed to prevent a vehicle from starting if alcohol is detected in your system. The device measures your Breath Alcohol Content (BrAC) to ensure you're below the legal limit. Retests may also be required while driving, with the BrAC limits and retest guidelines varying based on your state's regulations.

What is a BrAC level?

BrAC stands for Breath Alcohol Content. You must remain under your state’s legal limit, usually 0.02, to start your vehicle. Each state determines how many attempts you have at providing a passing sample. If you have questions about the legal limits in your state, you can contact an Intoxalock state specialist for help answering specific questions about state ignition interlock laws.

Curious about the difference between BAC and BrAC? Explore the differences.

Can other drivers operate my vehicle with an IID?

Yes, any licensed driver may drive your vehicle as long as they follow the correct procedures when using the interlock device. We recommend keeping a record of all drivers as well as extra mouthpieces for other drivers to use.

How do I submit a breath sample to an Intoxalock device?

The method of submitting a breath sample can vary depending on your state requirements. You will receive instruction on how to use your ignition interlock device at installation, but your Intoxalock State Specialist can also help answer any questions you may have.

Want to learn more about how the blow pattern works? Find out here.

How do I clean my ignition interlock device effectively?

Maintaining your IID involves regularly cleaning and sanitizing the mouthpiece and device exterior with a disinfectant and regularly swapping out the mouthpiece. Find detailed instructions and best practices on how to properly clean and sanitize your IID in our hygiene and sanitation guide.

Can an ignition interlock device shut my car off?

No, ignition interlock devices cannot shut off your vehicle once it's running. IIDs are designed only to prevent your car from starting if alcohol is detected. However, if you are operating a car and fail to pass a required retest, your vehicle’s horn or lights may activate as required by state laws. These alerts ensure safety without compromising vehicle operation.

What is an ignition interlock device random retest?

After starting your vehicle, random retests are required while driving to ensure you remain alcohol-free. When prompted by your device, you’ll have a 6-minute window to provide a breath sample, allowing you time to pull over safely if necessary. These tests are mandated by state law to ensure ongoing compliance while driving.

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Troubleshooting Ignition Interlock Device Problems

What is a lockout?

A lockout is a state-mandated function that prevents your vehicle from starting. Lockouts can occur if you blow a BrAC (Breath Alcohol Concentration) above the state’s legal limit, submit too many high BrAC samples, fail to provide a breath sample, or attempt to tamper with the ignition interlock device.

How many times can I fail an ignition interlock breath test?

Each state has specific regulations regarding the number of failed breath tests allowed. Typically, after several failed attempts, your Intoxalock device will enter a temporary lockout period, preventing you from starting your vehicle for a set time. If you continue to fail during multiple startup attempts, the IID device may go into a permanent lockout, requiring towing to a service center at your expense.

How can I bypass an ignition interlock device?

Ignition interlock devices are designed to detect any attempts to bypass or tamper with the system by analyzing unusual air patterns. Attempting to bypass the IID device can lead to severe penalties based on state laws. Additionally, many states now require IIDs with built-in cameras that capture an image each time a breath sample is submitted, ensuring the identity of the person providing the sample. Any bypass attempts will be reported to your state monitor, and penalties will be enforced according to state regulations.

What if my vehicle stalls or won’t start?

If your vehicle stalls, turn the key off. Within 2-4 seconds, your Intoxalock device will recognize this and initiate a 1-3 minute countdown. In most states, once the countdown begins, you can restart your vehicle without submitting a breath sample.

If your car doesn’t start, check your battery’s health by holding down the device button for 5 seconds. You can also test your car radio or lights to see if the battery is charged. If your battery is fine, contact our customer support team for assistance with troubleshooting your IID.

Will Intoxalock devices detect mouthwash or other products containing alcohol?

Ignition interlock devices are designed to detect any source of alcohol, including substances like mouthwash, perfume, hand sanitizer, household cleaners, and even some automotive products like wiper fluid. It’s important to avoid using these products inside your car. Wait at least 15 minutes after eating or drinking before submitting a breath sample. If you need to rinse your mouth, use water or an alcohol-free mouthwash.

Learn more about how to ensure clean breath samples.

What should I do if I experience issues with my interlock while traveling out of state?

Intoxalock has the largest service center network across the country, so we can assist you no matter where you are. Before traveling out of state, check with your monitoring authority to ensure you’re permitted to drive in other states. Additionally, confirm that the state you’re visiting recognizes your restricted license.

What should I do if I get a positive BrAC reading on the car breathalyzer?

If your Intoxalock ignition interlock device detects a positive BrAC reading:

Failed Startup Test: You may be prompted to retest repeatedly. You can keep trying or turn off the ignition. If asked for a retest after turning off the ignition, submit a sample as requested. All failed tests are recorded and reported. Each state has rules on how many failed tests are allowed before requiring your device to be serviced.

Failed Random Retest While Driving: You'll be prompted to retest until you pass or turn off the ignition. The same reporting and service requirements may apply.

Calibrating & Maintaining Your Ignition Interlock Device

What is a calibration?

A calibration is a routine maintenance appointment where your ignition interlock device is checked to ensure it’s measuring alcohol levels accurately.

What happens if I miss my required calibration due date?

Calibrations are required by state regulations, not the IID provider. Your device will tell you when your calibration date is approaching. Not getting your IID calibrated by the due date can lead to lockouts or violations.

If you miss calibration appointment, reschedule as soon as possible to avoid penalties.

How often do I need to calibrate my ignition interlock device?

Calibrations are required every 30-90 days, depending on your state regulations. Intoxalock IIDs are certified to go the maximum allowed time between calibrations.

Watch our car breathalyzer calibration video to learn more.

What is the calibration process for an ignition interlock device, and how long does it take?

Interlock calibrations are performed at your service center and typically take about 15 minutes. During the calibration, the technician will test and update your IID device as needed. You can call a location to choose a convenient time to stop in.

Find an ignition interlock service center location near you.

Can I have vehicle repairs or maintenance done if I have an IID?

Yes, but make sure the mechanic is aware of your IID. You should also log the maintenance in your MyAccount (online or in the Intoxalock app), keep all receipts, and in some states you may be required to report your vehicle maintenance as part of your IID requirements.

What should I do with my ignition interlock if I get a new car?

If you get a new vehicle, contact Intoxalock Customer Support to schedule a vehicle switch appointment. To ensure a smooth transition, have the following information ready:

Vehicle Identification Number (VIN)
Year, make, and model of the vehicle
Name of the registered owner
Vehicle color
License plate number

Providing these details will help streamline the process and get your ignition interlock device installed in your new vehicle quickly.

Can I use my IID in cold weather?

Your ignition interlock device works in all weather conditions. In cold temperatures, using our exclusive Sleep Mode can help preserve your car battery. This option is not available in New York due to state regulations.

Prepare for winter—check out our cold weather tips.

Managing Ignition Interlock Pricing & Billing

How much does an ignition interlock device cost?

The cost of an IID typically ranges from $70 to $120 per month but varies by state and vehicle type. Additional purchases required, such as installation, calibration, and removal. Incidental fees can occur if equipment needs to be unlocked due to multiple failed BrAC tests, or isn’t returned on time at the end of the lease term. Intoxalock offers competitive pricing and the best value with nationwide service centers and 24/7 support.

Call Intoxalock now at (844) 899-6211 or fill out the form above to get an accurate quote on your new ignition interlock device and start driving safely today!

What payment options do I have?

Intoxalock offers flexible payment plans to ease the financial burden, with options to pay monthly or bi-weekly. You can set up these interlock payment options during the account creation process, and they will appear in the Intoxalock Mobile App or in MyAccount.

If you need help setting up an interlock payment plan, contact our customer support team today at (844) 899-6211.

Can I qualify for financial assistance?

Your eligibility for financial assistance depends on your state's specific programs and other qualifying factors. To find out more, check your state’s available financial assistance options.

If you're unsure about your eligibility, an Intoxalock State Specialist can guide you through the next steps and help you determine if you qualify. Call (844) 899-6211 today or fill out a form above.

Can I make payments from a checking or savings account?

You can set up automatic payments using a debit or credit card. Unfortunately, automatic transfers from a checking or savings account are not available. However, we do accept one-time payments from a checking or savings account.

Can I mail my payments if I don’t have a credit card?

Payments can be mailed to:

Intoxalock,
P.O. Box 845360,
Dallas, TX 75284-5360

Please make sure to include the full customer's name on the account and the Customer ID Number.

Can I buy an ignition interlock device?

Ignition interlock devices are not available for purchase; they are leased for the duration of your required monitoring period. Devices for sale online may be stolen or unapproved for legal use, so always lease through a trusted provider like Intoxalock.

If you're looking for a personal breathalyzer to monitor your alcohol levels on the go, consider purchasing a portable breathalyzer like Keepr.

Call Intoxalock today at (844) 899-6211 or fill out the form above to learn more about affordable leasing options for IIDs and explore discounts available in your area.

Monitoring & Reporting IID Usage

How does my monitoring authority know I have an ignition interlock device installed?

After your IID installation, you’ll receive a Certificate of Installation. Depending on your state, you may need to provide this to your monitoring authority, or it may be automatically sent.

What information is reported to the state or my monitoring authority?

Reports include the time and BrAC level of each breath sample, missed tests, tampering evidence, and photo verification of driver identity. Additional items like missed calibrations and periods of non-usage may also be reported, depending on state and monitoring authority requirements.

What happens if someone attempts to disconnect or bypass a car breathalyzer?

Attempts to tamper with or bypass an IID are recorded and reported. This could lead to extended restrictions or other penalties.

What happens if I’m required to install an IID but don’t?

Failure to install an IID as required by your state could result in extended restrictions, fines, or even jail time. Learn more about penalties for driving with a suspended license.

Don’t risk penalties—Call our State Specialists at (844) 899-6211or fill out a form above and get your IID installed today.

Removing Your Ignition Interlock Device

Do I have to remove my IID or can I keep using it voluntarily?

Many Intoxalock customers decide that having an IID is invaluable and choose to keep using theirs voluntarily. We can help transition you to a voluntary account and a potential discounted rate.

Please contact an Intoxalock State Specialist to get answers to your questions and update your lease.

How do I remove my IID?

Do not attempt to remove your IID yourself. Any Intoxalock-certified service center can remove your ignition interlock device.

Schedule your removal appointment by calling Intoxalock Customer Support at (844) 899-6211

When am I eligible to remove my ignition interlock?

You must check with your monitoring authority, court, probation officer, or Department of Transportation to verify you are eligible to remove your ignition interlock device.

What paperwork should I receive from the service center when my IID is removed?

You'll receive a Certificate of Removal from the service center, confirming your IID has been properly removed.

What do I do with the paperwork from the device removal?

You may need to submit your documents to your monitoring authority, depending on state requirements. If you are unsure, contact Intoxalock via chat, email or phone.

How do I close my account?

After your IID is removed, call our Recovery Department at (844) 899-6211 to close your account. If you received equipment directly, return it immediately to finalize the process.

Call Us Anytime at (844) 899-6211

Intoxalock is an approved interlock provider in 46 states. Talk to a state specialist today for step-by-step assistance.