What an IID suspension means for your driving

An ignition interlock device (IID) suspension is not a suspension in the traditional sense — your license is not revoked, but you are required to install a breath-testing device in your vehicle before you can drive legally. If you fail to install it, or if you drive a vehicle without one, your license can be suspended or your driving privileges restricted. The device prevents your car from starting if it detects alcohol on your breath.

Most states impose IID requirements after a DUI or DWI conviction, or sometimes after a refusal to take a breathalyzer test during a traffic stop. The length of time you must use the device varies by state and by the specifics of your case — typically between one and three years. During this period, you are still legally allowed to drive, but only in a vehicle equipped with a functioning IID.

The cost of installation, monthly monitoring, and removal falls on you. Devices typically cost $100 to $300 to install, then $50 to $100 per month to maintain. If you miss a payment or fail a breath test, the device logs the violation and reports it to the court or your state's Department of Motor Vehicles, which can result in license suspension or extension of your IID requirement.

Key Takeaways

  • An IID suspension requires you to install a breath-testing device in your vehicle; you cannot drive without one during the suspension period.
  • Installation and monthly monitoring costs are your responsibility, typically ranging from $100 to $300 upfront and $50 to $100 per month.
  • Failing a breath test or missing a payment triggers a report to the court or DMV, which can extend your IID requirement or suspend your license entirely.
  • You must use the device in every vehicle you drive, including rental cars and borrowed vehicles, or face additional penalties.
  • Some states allow work-only driving privileges during an IID suspension if you meet specific conditions, but you still need the device installed.

How the device works and what happens during a test

When you start your vehicle, the IID prompts you to blow into a mouthpiece. The device measures your blood alcohol content (BAC). If your BAC is below the state's threshold (usually 0.02 percent, which is lower than the legal driving limit of 0.08 percent), the car starts normally. If your BAC is at or above the threshold, the engine will not start, and the device logs a failed test.

While you are driving, the device may ask for a rolling retest — another breath sample — at random intervals. This prevents you from having someone else blow into the device before you drive, then drinking afterward. If you fail a rolling retest, the device logs it and may trigger a horn or flashing lights to alert you to pull over safely.

Every test result — passed or failed — is recorded and transmitted to a monitoring service. Your state's DMV or the court receives a report, usually monthly. A pattern of failed tests or missed tests can result in license suspension, fines, or an extension of your IID requirement.

Installation requirements and where to get a device

Your state's DMV or the court handling your case will provide you with a list of approved IID vendors in your area. You cannot install just any device — it must be certified by your state and meet federal standards. Common vendors include LifeSafer, SCRAM, Interlock, and Smart Start, though availability varies by location.

You must schedule an appointment with an approved vendor to have the device installed. Bring your driver's license and proof of your IID requirement (usually a court order or DMV notice). The installation takes 30 minutes to an hour. You will also receive instructions on how to use the device, how to schedule maintenance appointments, and what to do if the device malfunctions.

After installation, you must return to the vendor for monthly maintenance checks. During these visits, the technician downloads the device's data, checks for tampering, and ensures the device is working correctly. Missing a maintenance appointment can be treated as a violation and reported to the court.

What violations trigger additional penalties

Failing a breath test is the most obvious violation, but there are others. Tampering with the device — disconnecting it, trying to bypass it, or having someone else blow into it — is a criminal offense in most states and can result in jail time, fines, and license suspension. Driving a vehicle without an IID when one is required is also a violation and can lead to license suspension or criminal charges.

Missing a scheduled maintenance appointment, failing to pay the monthly monitoring fee, or not showing up for a required retest can all be reported to the court. Each violation extends your IID requirement or results in a separate suspension. Some states impose a "hard suspension" — your license is revoked entirely — if you accumulate too many violations.

If you move to a different state while under an IID requirement, you must notify your original state's DMV and install a device in your new state as well. Failure to do so can result in your license being suspended in both states.

Insurance and driving with an IID

Once you have an IID installed, you must inform your auto insurance company. Some insurers will not cover you if you are driving with an IID and do not disclose it. Others may raise your rates or require you to purchase an SR-22 form (a certificate of financial responsibility) in addition to your regular policy.

An SR-22 is a document your insurer files with your state's DMV to prove you have the minimum required liability coverage. It does not cost extra — your insurer files it as part of your policy — but it signals to the state that you are a high-risk driver. You will typically need to maintain an SR-22 for three years after your DUI conviction, even after your IID requirement ends.

Some insurance companies specialize in high-risk drivers and may offer better rates than your current insurer. It is worth shopping around, but be honest about your IID requirement and DUI history. Lying to an insurer can void your coverage and result in fines.

Removing the device and ending the suspension

Once you have completed your IID requirement period without violations, you can request removal. Contact your state's DMV or the court that ordered the device to confirm you are may be able to access. You will need to provide proof that you have completed the required time period and that your monitoring reports show no violations or only minor ones.

Some states allow a small number of violations (such as one or two failed tests) and still permit removal. Others require a perfect record. Check with your DMV or the vendor to understand your state's specific rules.

Once you receive approval, schedule a removal appointment with your IID vendor. Removal is free or costs a small fee (usually under $50). The technician will uninstall the device and provide you with a removal certificate. Keep this certificate — you may need to show it to your insurance company or the DMV as proof that your IID requirement has ended.

Driving privileges during an IID suspension

In most states, you can drive to work, school, medical appointments, and court-ordered programs while your IID is active, as long as the device is installed. Some states impose additional restrictions, such as limiting you to specific routes or times of day, or requiring you to carry documentation proving you are driving for an approved purpose.

A few states offer work-only driving privileges if you can show that your license suspension would cause undue hardship — for example, if you need to drive to keep your job. To request work-only privileges, you typically file a petition with the court or DMV and provide evidence of the hardship. Approval is not may provide and depends on your state's laws and the judge's discretion.

If you are unsure what you are allowed to drive during your IID suspension, contact your state's DMV or the attorney who handled your case. Driving outside your permitted scope can result in additional criminal charges.

Frequently Asked Questions

Can I drive someone else's car if it does not have an IID?

No. If you are under an IID requirement, you can only drive vehicles equipped with an approved device. This includes rental cars, borrowed vehicles, and company cars. If you drive a vehicle without an IID, you are breaking the law and can face license suspension or criminal charges.

What happens if the IID device malfunctions?

Contact your IID vendor when ready. A malfunction does not excuse you from your requirement, but vendors understand that devices can fail. Document the malfunction and keep records of your communication with the vendor. If the device fails during a test, the vendor can often provide a loaner device or expedite repairs. Report the issue to your DMV or the court if it affects your ability to drive.

Can I get my IID requirement removed early?

Some states allow early removal if you have maintained a clean record for a portion of your requirement period — for example, six months instead of the full year. You must petition the court or DMV and provide evidence of compliance. Approval is not may provide and depends on your state's laws and the judge's discretion.

Do I have to pay for the IID if I cannot afford it?

Most states do not waive IID costs, but some offer payment plans or reduced fees for low-income drivers. Contact your IID vendor or your state's DMV to ask about financial hardship options. Some nonprofits and legal aid organizations also offer information. Do not ignore the requirement because of cost — doing so can result in license suspension or criminal charges.

Will the IID suspension show up on my driving record?

Yes. An IID requirement is part of your driving record and will appear on background checks for employment, housing, and insurance purposes. It typically remains on your record for seven to ten years, depending on your state. After that time, you may be able to petition to have it removed or sealed, but you should consult with an attorney about your state's specific rules.