What is an Ignition Interlock Device and How Does it Work?
An Ignition Interlock Device (IID) is a breathalyzer installed in a vehicle that prevents the engine from starting if alcohol is detected on the driver’s breath. It’s commonly required for individuals enrolled in the Impaired Driver Accountability Program (IDAP) following a drunk driving arrest. The IID is both a tool for accountability and a means of allowing limited driving privileges instead of full license revocation.
Call 405-591-3935 to let an experienced lawyer guide you to the best chance of retaining your driving privileges.
How Do Ignition Interlock Devices Work?
The device operates using fuel cell technology. When a person blows into the IID, a chemical reaction occurs on a platinum surface within the device. If alcohol is present, this reaction generates an electric current, which is converted into a blood alcohol concentration (BAC) reading. If the result is below .025 BAC, the vehicle starts. If it’s above, the ignition is blocked.
In addition to the initial breath test, the IID performs rolling retests—random breath samples requested while the car is in motion. These are required five to fifteen minutes after starting the vehicle. If a driver fails or misses a rolling retest, the device logs a violation, though the car won’t shut off. Instead, it may trigger alarms such as honking or flashing lights.
Accuracy and Reliability of Ignition Interlock Devices
IIDs are not perfectly accurate. While they serve a regulatory function, they are prone to false positives. Everyday substances like mouthwash, certain foods, and even medical conditions can sometimes cause the device to register alcohol where there is none. Compared to other methods of alcohol detection like spectroscopy, IIDs are less precise.
What Happens If You Fail The Ignition Interlock Device Breath Test?
Failing the initial IID breath test doesn’t immediately lock you out. You are typically allowed two more attempts within a 15-minute period. If all three attempts register a BAC over .025, a violation is recorded.
Rolling retest violations are slightly different. You must provide a new sample within five minutes if prompted. Failing to do so, or failing the retest itself, also results in a logged violation. The device may then activate alarms, though it won’t shut the engine off mid-drive.
What Happens After An Ignition Interlock Device Logs A Violation?
Once a violation is logged, you are required to report to a service center within five days. If you fail to do so, the device will prevent your vehicle from starting at all. At the service center, the device is calibrated, and the violation data is downloaded and sent to the Board of Tests for Alcohol and Drug Influence.
Depending on the circumstances, this can trigger a range of consequences:
An extension of your time in the IDAP, along with additional fees.
Mandatory retraining at your own expense.
Installation of a more advanced IID model, potentially with a camera.
Further restrictions on your driving privileges (e.g., limited hours or days).
Reevaluation of your eligibility for IDAP, which could lead to full license suspension.
You will also be expected to provide proof that any required remedial actions have been completed.
Can You Fight Ignition Interlock Device Violations?
Yes, violations can be challenged. Since IIDs are not always accurate, it’s possible to present evidence that the device malfunctioned or registered a false positive. A technical issue, a contaminated sample, or a faulty device can all form the basis for a successful appeal. In such cases, having representation is critical to building a strong case against the violation and avoiding unnecessary penalties.
Downsides of Ignition Interlock Devices
Beyond potential false positives, IIDs come with other drawbacks. They are expensive—installation fees, monthly calibration fees, and service charges add up quickly. For many, these costs are a significant burden.
Additionally, not everyone is eligible to have an IID installed. If your offense is particularly serious or you’re a repeat offender, you may be denied participation in the IDAP altogether. You also need a functional vehicle at the time of your IID installation. If your car is undrivable due to damage or lack of repair, you won’t be able to fulfill the program’s requirements.
How Can A Lawyer Help If You Have Been Accused Of A DUI?
If your vehicle is pulled over and you are accused of a DUI, representation by a skilled attorney is essential.
There are a large number of ways an attorney could assist you. These include:
- Contesting your DUI charge with the opportunity to get the case dismissed, allowing you to avoid IID installation entirely.
- Giving you assistance applying for the IDAP, or appealing your participation if the IDAP refuses you.
- Assisting you to decide the best approach to your specific situation, while considering all of the evidence and individual factors at play.
- Appealing any IID violations that may occur due to false flags, technical errors, or any other failure that was not caused by a fault of your own.
- Helping you explore other remedial driving possibilities is also open to those who have been accused of operating a vehicle while intoxicated.
Hire A DUI Lawyer Today
If you have been accused of operating your vehicle while intoxicated, Oklahoma State’s laws may allow you to fit an Ignition Interlock Device to your starter motor in order to earn back your normal driving privileges.
However, this is not the only option, you may also contest your DUI charge entirely. Or perhaps you have had an Ignition Interlock Device fitted, only to be falsely accused of a violation. Finally, maybe you are just not sure what the best action to take in your specific circumstances is. An experienced and skilled DUI lawyer, like the ones on the team here at Cannon & Associates, can help with all these situations.
Make the right decision with your driving future and call us today at 405-591-3935.
