Fast. Easy. Discreet. RoadGuard Interlock gets you back on the road with a car breathalyzer that is FAST to warm up, EASY to use, and DISCREET so you can focus on the road ahead. As an approved Virginia Ignition Interlock provider, we have convenient ignition interlock installation near you in Fredericksburg, Virginia at 24 Synan Road. With a proven track record, RoadGuard Interlock offers top-tier ignition interlock devices that won't damage your vehicle, professional installation, and reliable customer service. Call us today to schedule an appointment for your car breathalyzer installation, calibration, or removal in Fredericksburg or any of our other convenient locations throughout the state of Virginia.
El señor es muy buena persona , y muy rápido cada ves que vengo a calibrar la máquina de mi carro , una ves me confundí , vine dos días antes de mi cita y el me dijo que yo estaba mal , pero aún así el me hizo el servicio , lo recomiendo , ahora estoy acá para que me remuevan la máquina
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Shawn Williams
Jul 31, 2025
5.0
Andrew is the best
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Kasey
Jan 3, 2021
5.0
I had my device removed last month. Andrew is very knowledgeable and nice. His personality is different but you just have to know how to take it and how to respond. He responded to a question I had when he was on vacation and is willing to adjust your appointment time if there is an issue and he is available. I only had one issue with the device and I was able to come in and have it corrected, Andrew was out of town but I was referred to the next nearest location and they were very helpful. It is an electronic device so we do have to remember that error's are bound to happen. I would also like to say/warn, with Covid, I did use hand sanitizer once after pumping gas and forgot that it contains alcohol, I failed my initial blow (since my hands were holding the device) but passed the re-take so I was fine, please keep that in mind, be careful when using sanitizer. I would definitely recommend this shop.
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Brian Sherwood
Oct 26, 2020
5.0
Although it was an inconvenience, Andrew at the Fredericksburg office was, professional and knowledgeable. Glad it’s gone 😁
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Christopher Brletich
Dec 1, 2019
3.0
Giving this a 3/5 due to professionalism and electrical issues with my car. Andrew Harper is very knowledgeable/capable but oftentimes was very short and not very personable. After having an appointment, my next was improperly scheduled and I was locked out of my device. Despite the fact that no one at Draeger could make sense of the sequence of events, I had my device removed no problem/in time. Lastly, my car ended up dying and having to be junked. My vehicle had zero issues prior, then ALL of a sudden has the ignition theft module lock up, and then the EMS started throwing codes. I had to have at home service calls the last few appointments, which charged almost double the monthly maintenance cost. I also had a random lockout that couldn't be explained (except for a forgetting to update appointment times on their end again). Anyone can cry foul either way, just giving my experience. Overall I am disappointed about my experience and wouldn't recommend them.
Frequently Asked Questions About RoadGuard Ignition Interlock
How does an interlock device work?
When you start your vehicle, you have to blow into a mouthpiece that’s connected to the ignition interlock device, sometimes called an in-car breathalyzer. The interlock device will then measure your breath alcohol concentration (BrAC) and automatically determine whether your BrAC is low enough to allow the car to start. Any test you take, whether pass or fail, will be reported to your monitoring authority.
How much does an ignition interlock device cost?
Ignition interlock device costs vary because each state has different pricing regulations and device technology requirements. But in general, you can expect to pay between $50 and $150 to install the interlock device depending on vehicle type. After the initial interlock installation, you are required to pay a monthly rental or lease fee. On average, the cost to rent or lease an interlock device is between $50 and $150 per month. Call us at 1-833-545-0368 for pricing in your area.
Do you have any offers or current deals?
We are currently offering your first month free. Give us a call at 833-545-0368 to learn more, or visit us at roadguardinterlock.com