Problems With Ignition Interlock Devices in Massachusetts

Ignition interlock devices sound straightforward in theory: blow into the device, pass the test, and drive. In practice, drivers across Massachusetts run into a range of technical and procedural problems that can put their licenses at serious risk, even when they have done nothing wrong. Understanding how these devices work under Massachusetts law, what counts as a violation, and what your options are when something goes wrong can make a significant difference in the outcome of your case.

What Is an Ignition Interlock Device?

An ignition interlock device (IID) is a breath-testing unit installed in a vehicle that prevents the engine from starting if it detects alcohol.

The device requires a breath sample before the car will start. It also requires rolling retests at random intervals while the vehicle is in motion. If a driver fails or misses a rolling retest, the device records the event as a violation. Approved IID devices will not shut off your vehicle’s engine or stop your vehicle while you are driving if alcohol is detected. They simply prevent someone who has a BAC above .02 from starting the vehicle. 

In Massachusetts, IID requirements are governed by Massachusetts General Laws Chapter 90, Section 24 ½. . The Registry of Motor Vehicles (RMV) oversees the program and requires drivers to use only RMV-approved devices installed by RMV-certified service providers. Approved device models and vendor information are maintained through the Massachusetts RMV.

Who Is Required to Use an Ignition Interlock Device in Massachusetts?

Massachusetts law generally requires IID installation for drivers with two or more OUI convictions. Some first-offense drivers seeking hardship licenses may also be required to install an IID depending on the legal basis for their suspension and the applicable RMV requirements.

Under M.G.L. c. 90, § 24 1/2, any driver with two or more OUI convictions must have an IID installed for the entire period of any hardship or Cinderella license, and for an additional period after full license reinstatement. First-time OUI offenders who participate in the 24D disposition program are not automatically required to use an IID, but they may be required to do so as a condition of a hardship license depending on their specific circumstances.

Drivers required to use IIDs must have their devices monitored and calibrated at a certified service center at regular intervals of 25-30 days. Missed monitoring appointments are violations and 2 missed (or late) service visits will trigger a 10-year license suspension. 

Common Problems Drivers Experience With Ignition Interlock Devices

IID problems range from false positives and equipment malfunctions to calibration errors and compliance violations that can threaten license reinstatement.

Despite being court-approved technology, ignition interlock devices are not immune to error. Some of the most frequent issues our clients report include:

• False positive readings caused by mouthwash, certain foods, medications, or even burping near the device.
• Device malfunctions that prevent the car from starting even when the driver has not consumed any alcohol.
• Rolling retest failures when a driver is caught in traffic or physically unable to provide a breath sample safely.

Any of these issues, if flagged as a violation, can trigger an RMV hearing and potentially result in a license suspension, even if the driver was fully sober.

What Happens When the RMV Receives a Violation Report?

Depending on the nature of the reported violation, the RMV may suspend your license or take other enforcement action. If your driving privileges are suspended, you may need to appear at an RMV hearing before reinstatement can be considered.

The RMV generally relies on reports submitted by the IID vendor and does not independently determine whether a reported violation resulted from a device malfunction before taking administrative action. Instead, drivers are typically notified of a suspension and must request a hearing to contest the finding. That hearing is your opportunity to present evidence showing that the reported violation was caused by a malfunction, a false positive, or another issue outside your control.

At a Massachusetts RMV hearing, drivers should be prepared to present evidence showing that a reported violation resulted from a malfunction, false positive, or another circumstance that should not lead to additional licensing consequences. Without documentation, maintenance records, or a clear understanding of how IID data is interpreted, drivers are often at a disadvantage.

How to Protect Yourself When IID Problems Occur

Document every malfunction immediately, contact your service provider for a written report, and consult a Massachusetts license reinstatement attorney before your RMV hearing.

If your device malfunctions or produces an unexpected reading, take the following steps right away:

1. Note the date, time, location, and specific error displayed by the device and immediately go to the nearest police station or State Police Barracks to ask for a comparison breath test. 
2. Contact your certified IID service provider and request a written diagnostic report.
3. Preserve any records of food, medications, or dental products used near the time of the incident.
4. Request any available event logs or detailed records from your IID vendor in addition to the reports submitted to the RMV.

These records can be critical evidence at an RMV hearing. A written report from the service provider documenting a calibration issue or device defect can be valuable evidence when contesting a reported violation.

Drivers dealing with OUI license suspensions in Massachusetts face a system where technical errors can have real-world consequences. Acting quickly and building a documented record from the start puts you in a much stronger position.

How The Law Office of Brian Simoneau, P.C. Can Help

The Law Office of Brian Simoneau, P.C. focuses exclusively on Massachusetts driver’s license law and RMV matters. Our firm has successfully handled thousands of IID violation hearings, license reinstatement cases, and hardship license applications throughout the state, including for drivers in Marlborough and across Middlesex and Worcester Counties.

If you received notice of an IID violation or your license has been suspended because of a reported device issue, we offer free case reviews. Call us at 508-625-5776 or contact us to talk through your situation and understand your options before your hearing date.