Mount Vernon, IL ignition interlock: 1 certified installer
1 in town, 21 more within reach of Mount Vernon
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1 certified center in Mount Vernon, run by 2 providers. Addresses below — call ahead, most centers fit devices by appointment.
Certified installation centers in Mount Vernon
Sorted by how far they are from the center of Mount Vernon. Where two providers work out of the same garage, we list the garage once with both names, and we include nearby towns when their center is closer than one of your own.
Compiled from providers’ own public location directories and deduplicated to unique physical places (how we build this index). Listing is not an endorsement, and no center pays to appear.
Not sure which center to call?
Send your details once and certified installers covering Mount Vernon will get in touch with availability and a price for your term. It costs nothing, and you are not committing to anything by asking.
We pass your details only to providers that are certified in Illinois. We never sell your information on, and you can tell them to stop at any time.
What it costs in Mount Vernon
Interlock pricing is set at state level, so what applies in Mount Vernon applies across Illinois. These figures come from the price schedule filed with the state.
| Charge | Amount | What it covers |
|---|---|---|
| Installation | $85 | average across vendors, paid to the provider |
| Monthly | $110 | $80 device rental to the provider plus a $30 state monitoring fee |
| Removal | $150 | de-install labor on the filed LifeSafer schedule |
State guidance figure · About the Breath Alcohol Ignition Interlock Device — Illinois Secretary of State · checked 2026-08-23
The fees nobody quotes you over the phone
These are charged on top of the three above, and they are where a cheap-looking Illinois quote turns expensive.
| Fee | Amount |
|---|---|
| Violation reset | $75 |
| Missed appointment | $55 |
| Early contract termination | $250 |
| Vehicle swap | $275 |
| Lockout override code | $50 |
| Install labor on a 2012-or-newer vehicle | up to $300 |
- The state monitoring fee is paid up front and is non-refundable.
- Penalty fees come from the vendor schedule filed with the Secretary of State.
What Illinois requires
Illinois gives a first-time offender the Monitoring Device Driving Permit, which lets you drive without limits during the statutory summary suspension on one condition: a certified BAIID in the vehicle. The device blocks the engine at 0.025% and carries a camera that photographs whoever is blowing.
- First offense: For the length of the statutory summary suspension; the Secretary of State downloads the device data every 30 to 60 days and asks you to explain any violation it finds
- Lockout threshold: 0.025% — the Secretary of State states the vehicle will not start at that reading or above; Illinois also requires a camera on the device
- Program run by: Illinois Secretary of State, BAIID Division
Why Illinois orders these devices
An interlock order is not a judgment about you personally — it is what the state does with every case of this kind, and the reason sits in the crash record.
Source: NHTSA Fatality Analysis Reporting System, 2020–2022. The count covers fatal crashes where police recorded that a driver had been drinking, which is narrower than the federal 0.08 BAC measure and therefore understates the real figure. Jefferson County runs above the Illinois average, which is part of why the interlock requirement here is enforced the way it is. What the device changes is measurable too: a car fitted with one cannot be started over the limit, which is why the order attaches to driving privileges rather than to the sentence.
Other cities in Illinois
If nothing in Mount Vernon works for you, a center one town over often has an earlier appointment — the price does not change.
Interlock questions in Mount Vernon
Where can I get an ignition interlock device installed in Mount Vernon, IL?
We index 1 certified installation point in Mount Vernon, run by ADS Interlock, Intoxalock. Addresses are listed above. Book with the provider your paperwork names, not the nearest one — a device approved in one state is not automatically approved in the next, and switching brands mid-term means a second installation fee.
How much does it cost to have an ignition interlock device installed in Illinois?
Illinois publishes its own figures rather than leaving it all to vendors: up to $85 to fit the device and up to $110 a month while it stays on the car. Removal is billed separately at the end of the term.
Can I drink one beer and still start the car in Illinois?
Almost certainly not. 0.025% — the Secretary of State states the vehicle will not start at that reading or above; Illinois also requires a camera on the device That is far below any drunk driving limit, which is the point: the device is not testing whether you are impaired, it is testing whether you drank. One drink shortly before a test is enough on most programs, and the fail is recorded whether or not you try again.
What does an ignition interlock device do?
An ignition interlock is a breath-alcohol tester wired into your car ignition. You blow into it before starting the engine; if your breath alcohol is above the state threshold, the engine will not start.
While you are driving, the device asks for rolling retests at random intervals. Every sample, skipped test, and lockout is recorded and sent to the agency monitoring your case.
All Illinois cities →Why Illinois requires it →What it costs in Illinois →DUI lawyers in Illinois →If the device recorded a violation →
The class Illinois requires →The insurance filing in Illinois →