Facing an OWI charge in Wisconsin can feel overwhelming, especially when you’re told you must install an ignition interlock device (IID) in your vehicle. Many people in this situation have never heard of such a device before and understandably have concerns about how it works, what it costs, and how it will affect daily life. This guide is designed to answer the most common questions about ignition interlock devices and help you understand what to expect.
If you have immediate concerns about an ignition interlock device requirement, contact Melowski & Singh, LLC through the online contact form or call (920) 294-1414 for guidance.
What Is an Ignition Interlock Device (IID)?
An ignition interlock device is a small piece of equipment installed in your vehicle that prevents it from starting unless you provide a clean breath sample. Think of it as a car breathalyzer. The IID is wired directly into your car’s ignition system. If the device detects alcohol on your breath above a certain threshold, the engine will not start.
Wisconsin law requires many people convicted of operating while intoxicated (OWI) to install an IID. In some cases, the court may order installation even after a first offense, depending on the circumstances.
How Does an Ignition Interlock Device Work?
The basic steps are simple, but they can take some adjustment:
- Blowing into the device – Before the car will start, you must blow into the IID to provide a breath sample.
- Monitoring while driving – In many cases, the device will require additional breath tests, called “rolling retests,” while you’re driving. These ensure you remain alcohol-free during your trip.
- Recording results – Every test you take is logged and stored. This data can be sent to authorities to ensure compliance with court orders.
While the process is straightforward, it’s natural to worry about how this may affect your daily commute or family responsibilities. The reality is that once you adapt to using the IID, it usually becomes part of your normal routine.
Common Concerns About Ignition Interlock Devices
Many people have the same concerns when they first learn they must install an IID. Here are some of the most frequently asked questions:
Will the IID Damage My Car?
No. Certified technicians install the device so it integrates with your ignition system without causing harm. Once removed, your car will operate normally.
Is the Device Safe While Driving?
Yes. Rolling retests are designed with safety in mind. The device will give you plenty of time to pull over or blow safely while driving. It will not shut down your car while you’re on the road.
What If the Device Malfunctions?
If you believe your IID is malfunctioning, contact the installation company immediately. Document the issue and keep records of any problems. Malfunctions are rare, but if they occur, the law does not hold you responsible for something outside your control.
Can Others Drive My Car?
Yes, but they must also blow into the device to start the vehicle. It’s important to explain the system to anyone who might drive your car to avoid confusion or unnecessary violations.
False Positives: Why They Happen and How to Avoid Them
One of the most frustrating parts of living with an IID is the possibility of a “false positive”—when the device detects alcohol even though you haven’t been drinking. These situations are not uncommon and can cause unnecessary stress. Fortunately, there are ways to reduce the risk.
Common Causes of False Positives
- Mouthwash or breath sprays – Many contain alcohol strong enough to trigger the device.
- Certain foods – Ripe fruit, energy drinks, or baked goods made with alcohol can sometimes set it off.
- Medications – Cough syrups, cold remedies, and some liquid prescriptions may include alcohol.
- Environmental exposure – Gasoline fumes, paint, or strong cleaning chemicals can occasionally cause issues.
Tips to Prevent False Positives
- Rinse with water after using mouthwash or eating before blowing into the IID.
- Read medication labels carefully and ask your doctor or pharmacist about alcohol-free alternatives.
- Wait a few minutes after eating or drinking anything questionable before testing.
- Keep detailed notes if a false positive occurs—this documentation can be helpful if authorities question the result.
By taking precautions, you can greatly reduce the chance of a false positive disrupting your daily routine.
Costs and Practical Considerations of IIDs
The cost of an ignition interlock device is often one of the biggest concerns. You will typically be responsible for:
- Installation fees – A one-time payment for setting up the device in your vehicle.
- Monthly monitoring fees – Regular costs for the company to maintain and monitor your device.
- Removal fees – A charge to take the device out once your court order ends.
While these expenses can add up, failure to comply with IID requirements can result in additional penalties, including extended license restrictions.
Tips for Living with an Ignition Interlock Device
Adjusting to life with an IID can take some patience. Here are a few practical tips that may help:
- Plan ahead for rolling retests. Give yourself time to safely provide samples without feeling rushed.
- Keep your car maintained. A low battery or electrical problems can interfere with the device’s operation.
- Stay mindful of everyday products. Certain foods, mouthwashes, and medications can cause false positives if they contain alcohol. Rinse with water before testing if you’ve consumed anything questionable.
- Communicate with your service provider. Report issues quickly and ask questions during scheduled maintenance appointments.
With preparation and awareness, most people find that the IID becomes a manageable part of daily driving.
How Long Will I Need an Ignition Interlock Device?
The length of time you must use an IID depends on your case. In Wisconsin, the law may require installation for a minimum of one year, and sometimes longer if you have multiple OWI convictions. The clock only runs when you are actually driving with an IID-equipped vehicle, so delaying installation can also delay completion of your requirement.
For more details about Wisconsin IID laws, visit our firm's Ignition Interlock Device page.
What Happens If I Violate IID Rules?
Violating IID rules—such as failing a test, tampering with the device, or letting someone else blow into it for you—can result in serious consequences. These may include:
- Longer IID requirements
- Additional fines
- Possible jail time in some circumstances
If you are accused of violating IID requirements, legal guidance can make a significant difference in how your case is handled.
Ignition Interlock Device Help in Wisconsin
If you are facing an ignition interlock device order, you don’t have to navigate this alone. Melowski & Singh, LLC has represented countless individuals dealing with OWI charges and IID requirements in Wisconsin. Our team can explain your options, help you avoid costly mistakes, and protect your driving privileges.
Call (920) 294-1414 or use the online contact form today to discuss your situation with a skilled DUI defense attorney.