An ignition interlock device can become part of an Idaho DUI case through more than one legal path. A court order, an administrative license suspension, and Idaho’s criminal DUI statutes may overlap. That is why a person should follow the written order and the Idaho Transportation Department record for the specific case rather than relying on a generic start or end date.
Idaho also changed its ignition-interlock law effective July 1, 2026. The current statute sets a 0.025 alcohol concentration threshold for the device and requires reporting when a person is prevented from starting the vehicle at that level. The amended law also addresses when the one-year restriction period under Idaho Code section 18-8008 begins.
This guide explains the system, common alleged violations, and the records a lawyer may review. It does not replace the order entered in your case.
What an Ignition Interlock Device Does
An ignition interlock is installed in a motor vehicle and requires a breath sample before the vehicle can start. Idaho-approved devices include a camera that records the person providing samples and stores identifying event information. The system may also request additional samples while the vehicle is being operated.
Idaho’s approved-device rules use a 0.025 setpoint. That is much lower than the 0.08 adult per se DUI threshold. The numbers serve different purposes:
- 0.025 is the interlock setpoint used to prevent a vehicle start and generate an interlock event.
- 0.08 is the general per se alcohol concentration for an adult noncommercial DUI charge.
A 0.025 interlock event is not itself a new DUI conviction. It can still lead to reporting, court scrutiny, or consequences under the person’s order.
Who May Be Required to Install an Interlock?
An interlock requirement can arise after a DUI conviction, a failed evidentiary test and administrative suspension, or a refusal-related proceeding. The particular statutes do not all operate identically.
Before driving, confirm:
- Which order or suspension created the requirement;
- The vehicles to which it applies;
- The installation deadline;
- The restricted-license conditions;
- The required duration;
- The approved vendor and service schedule; and
- What documentation must be sent to the court or ITD.
Do not assume an interlock installed for one case or one legal track automatically satisfies every other order. Ask the court, ITD, or your lawyer to resolve inconsistent dates in writing.
For a broader overview of possible DUI consequences, see DUI Penalties in Idaho.
When Does the One-Year Period Begin?
This question requires special care after Idaho’s 2026 amendment.
For a requirement governed by Idaho Code section 18-8008, the statute effective July 1, 2026, says the one-year restriction ends one year from the date the vendor provides proof of installation to the Idaho Transportation Department. The vendor is required to send that proof to ITD.
Other interlock provisions—including failed-test and refusal statutes—contain their own wording and may be reflected differently in a court order or driver record. The safest practice is to:
- Use an ITD-approved provider;
- Confirm that the provider transmitted proof of installation;
- Save the installation receipt and transmission confirmation;
- Obtain the exact restriction dates from ITD; and
- Resolve any conflict with the court order before driving.
Installing a device but failing to document it can create an avoidable dispute about compliance time.
Use an ITD-Approved Provider
The Idaho Transportation Department publishes a list of certified ignition-interlock providers. ITD does not install devices or recommend one vendor over another. The agency advises drivers to compare service locations, availability, and costs.
Ask a provider about:
- Installation and removal fees;
- Monthly lease or monitoring fees;
- Calibration and service intervals;
- Lockout or reset fees;
- Available service locations and hours;
- The process for reporting a malfunction;
- How proof of installation reaches ITD; and
- How to obtain a complete event log and camera record.
Costs and provider terms can change, so a fixed price quoted on a legal website may quickly become inaccurate.
What Counts as Tampering or Circumvention?
Idaho’s rules define circumvention as bypassing the device’s correct operation by starting or operating a vehicle without providing the required breath test. Tampering includes an attempt to disable, adjust, or alter the proper operation of the device or camera.
Examples that can create serious problems include:
- Asking another person to provide a sample so the restricted driver can operate;
- Disconnecting or altering wiring;
- Covering, moving, disabling, or obstructing the camera;
- Using an unauthorized method to start or operate the vehicle;
- Missing required service in an effort to avoid a download; or
- Removing the device without authorization.
Idaho law also makes it a misdemeanor knowingly to help a restricted person start or operate a vehicle in violation of a court order, subject to limited safety and repair exceptions when the restricted person does not operate the vehicle.
Do not try to “fix” a device by opening it, rewiring it, or having someone else blow. Report a suspected malfunction to the provider and document the event.
Failed Starts, Rolling Retests, and Lockouts
Effective July 1, 2026, Idaho Code section 18-8008 requires a vendor to notify the prosecuting authority whenever a person is prevented from starting the vehicle because a valid breath sample showed an alcohol concentration of 0.025 or more.
An event log may also record:
- A missed or failed rolling retest;
- A refused sample;
- A power interruption or attempted disconnection;
- Camera obstruction or an identity concern;
- A missed calibration or service visit;
- A startup attempt by another person;
- A lockout; or
- A device error or service code.
Not every event proves intentional misconduct. A useful review asks what the raw data, camera image, service record, and surrounding timeline show. Possible explanations can include a device malfunction, electrical work, a vehicle repair, a missed prompt, another household driver, or exposure to an alcohol-containing product. An explanation should be supported with records rather than assumed.
What to Do After an Unexpected Interlock Event
If a device reports an unexpected result or malfunction:
- Follow the device and provider instructions without attempting to bypass the system.
- If the instructions permit, provide a prompt retest. A later result does not erase the first event, but the sequence may provide context.
- Contact the approved provider and create a written service record.
- Photograph or save any displayed error code when it is safe and lawful to do so.
- Preserve receipts, repair orders, medications, or product information that genuinely relates to the event.
- Write down the time, location, driver, passengers, and what occurred while your memory is fresh.
- Contact a lawyer before giving a detailed explanation to a prosecutor or court.
Idaho’s equipment rules require a vendor to repair or replace a defective device within a specified period after a complaint. Prompt reporting helps preserve both the problem and the response.
How an Idaho DUI Lawyer Reviews an Alleged Violation
The event summary may not tell the entire story. Counsel may seek:
- The complete device download rather than a one-line violation notice;
- Breath values and precise timestamps;
- Camera images associated with each event;
- Rolling-retest prompts and response times;
- Installation, calibration, and maintenance history;
- Malfunction and help-desk records;
- Vehicle battery, electrical, and repair records;
- The vendor’s certification and device approval;
- Proof of installation submitted to ITD; and
- The actual court order, probation terms, and ITD restriction.
The legal question can differ from the technical question. A device may accurately record an event, but the court must still decide what that event means under the applicable order and whether the state can prove a violation.
Is Relief From the Interlock Requirement Possible?
Idaho Code section 18-8002 provides a limited procedure for relief from statutory ignition-interlock requirements. The person generally must prove by clear and convincing evidence that the person does not present a danger to the public or that exceptional or mitigating circumstances justify relief. Financial hardship alone is not enough.
That is a demanding standard, not an automatic waiver. Filing deadlines and the proper court can also matter. Idaho law separately provides a fund that may assist qualifying people with financial hardship. A lawyer can determine whether either process applies to the order at issue.
Frequently Asked Questions
Is the interlock limit the same as the DUI limit?
No. Idaho’s interlock setpoint is 0.025. The general adult noncommercial per se DUI threshold is 0.08. An interlock restriction is designed to prevent operation at a lower concentration.
Will a failed start be reported?
Under Idaho Code section 18-8008 as amended effective July 1, 2026, the vendor must notify the prosecuting authority when a valid breath sample of 0.025 or more prevents the vehicle from starting.
Does one failed start automatically mean a new DUI?
No. A failed start is not automatically a new DUI conviction. It may be evidence of an interlock or court-order violation and should be reviewed with the complete log, camera record, and surrounding facts.
Can someone else blow into the device for me?
No. Asking someone else to provide the sample so a restricted driver can operate can be circumvention, and the helper may also face criminal consequences.
Must the interlock be installed in every vehicle I own?
The critical question is which vehicles you are permitted to operate under the statute and the exact court or ITD restriction. Do not operate a vehicle without the required device based on an assumption that ownership, work use, or occasional use creates an exception.
When can the device be removed?
Use the written end date and obtain any required court or ITD authorization. The provider’s installation anniversary alone may not resolve overlapping orders. Do not remove the device early.
Talk With an Idaho DUI Lawyer
If you are unsure about an installation date, restriction period, or alleged violation, get the order and device records reviewed before the problem grows. Attorneys of Idaho offers free, confidential case reviews for DUI and related license matters.
Contact Attorneys of Idaho or call 208-314-8888.
This page provides general information, not legal advice. Interlock statutes, administrative requirements, provider procedures, and court orders can change.
Talk With an Idaho DUI Defense Attorney
Deadlines and defense options depend on the facts of your case. Contact Attorneys of Idaho for a free, confidential case review.
