Top 8 Ignition Interlock Device Q&A

With the resources available today, you can find out a lot of information very quickly about ignition interlock devices. Unfortunately some of what you hear and read is simply not true. Below are some very common questions and answers regarding interlock devices.

1.       Isn’t an interlock device really expensive?

The average daily cost of an ignition interlock device is less than a café grande in a coffee shop or a drink in a bar. Also, if you are unable to pay for a device, our expert agents will be able to tell you whether your state may be able to offset some of the costs through a special state fund set aside for those who need it.

2.    Do ignition interlock devices record false positives? exclusively uses devices approved by the National Highway Traffic Safety Administration (NHTSA) which has set strict standards for accuracy in testing BAC. Before installation, your interlock device will be calibrated to meet the requirements of your individualized program and maintained throughout the probation period.

Top 8 Ignition Interlock Device Q&A3.    Will I be required to breathe into the device while driving?

You are never required to test while operating a vehicle. If the device signals you for a test it automatically allows time for you to pull off to the side and stop. These “running tests” are easy and fast to complete so you can be back on the road in just a couple of minutes.

4.    Do I have to have a device installed if I have breathing issues?

The ignition interlock device is designed to work for those that have asthma or other health conditions that prevent the ability to take deep breaths. With approval from the court and your physician, the installer can adjust the settings on your device to reduce the required breath pressure if needed. Check with your service provider first to determine if the default pressure requires adjustments.

5.    Will my vehicle’s battery be damaged by an interlock device?

Very little power from your car’s battery is used to power the device for a test. Use of an ignition interlock will not drain or damage car batteries.

6.    If I fail a test will the engine of my car stop while I’m driving down the street?

The ignition interlock device will not turn off your car while it is running. Some states require that the car produce a signal such as flashing lights or horn honking if you fail a test while the car is on and the signal will not stop until the car is off or until you pass a test.

7.    Will mouthwash or chewing gum mess with the test results?
We advise device users who use mouthwash or chew gum to rinse their mouths with water prior to testing. Users are also advised to use mouthwash that is clearly labeled as having no alcohol and rinse with water before testing to avoid any issues. Also be aware of the alcohol contents of any gum that you may chew as any trace of alcohol will cause the test to fail.

8.    Will the interlock device decrease the resale value of my truck?

Our service technicians are experts in vehicle wiring. The device will be installed professionally and when they remove it, the wiring will be restored to its former state so that the device will have no impact on your vehicle’s resale.

For additional information on ignition interlock devices, please visit us at

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