RoadGuard Interlock Review (2026): Dräger Hardware, Costs & Fees
RoadGuard Interlock runs Dräger hardware in the United States — if you’ve searched for a Dräger interlock, this is the company you’ll actually deal with. Dräger is a century-old German maker of breath-alcohol and medical equipment, and the device is the main reason to pick RoadGuard over a cheaper competitor.
RoadGuard’s advantage is the hardware: Dräger fuel-cell breath testing is the same technology lineage police forces use. The company also offers a price match in some locations, which is worth knowing before you accept anyone’s first quote. Its published cost ranges are broad and largely borrowed from third-party figures rather than its own rate card, so the number that matters is the one you’re quoted for your state.
Call for a free quoteRoadGuard at a glance
| Hardware | Dräger devices; fuel-cell breath sensing |
| Installation | $50–150 depending on vehicle type |
| Monthly lease | $50–150; company cites a third-party source for the range |
| State examples | Around $60–100 a month in Virginia and Missouri; around $90–140 in Minnesota |
| Removal | $50–150 |
| Lockout / violation reset | $30–80 |
| Price match | Offered depending on location |
| Promotions | State offers have included free installation plus a first-month credit, with a six-month minimum lease |
What RoadGuard costs
RoadGuard publishes ranges rather than a rate card, and cites an outside source for some of them. The state examples on its own pages are more useful than the national ranges.
| Installation (one time) | $50–150 |
| Monthly lease | $50–150 |
| Lease — Virginia / Missouri examples | $60–100 |
| Lease — Minnesota example | $90–140 |
| Lockout or violation reset | $30–80 |
| Removal | $50–150 |
Installation, lease and removal at the published national ranges. The spread is very wide because the published ranges are wide; the state figures above are a better guide if yours is listed. Excludes state program fees and any lockout charges.
- Whether a price match is available at your nearest location — it’s offered, but only in some places
- Whether maintenance and monitoring are billed with the lease or separately; RoadGuard says this varies by state
- The lockout and violation reset fee, published as a $30–80 range
- Whether any current promotion applies, and what minimum lease term it requires
- The removal fee, and that installation, maintenance and removal are all due at time of service
- Whether your state requires a separate payment to a state agency on top
Pros and cons
- Dräger hardware — a long-established breath-alcohol manufacturer
- Price match available depending on location
- Publishes its lockout and reset fee range, which several competitors don’t
- State-level promotions have included free installation and a first-month credit
- Published national ranges are very wide and partly cite third-party figures
- Smaller service network than the largest providers ⚠ count not published
- Brand confusion: many drivers search for Dräger and don’t find RoadGuard
- All service costs are due at the time of service, so there’s less billing flexibility
How it works day to day
Testing
A breath sample starts the vehicle, with random retests while driving. RoadGuard’s devices use fuel-cell sensing, which is the more accurate of the two common technologies. The company notes the device cannot shut off a running engine — a common and understandable fear that isn’t how interlocks work.
Avoiding false positives
Mouthwash, hand sanitiser and some foods can trigger a reading. RoadGuard advises waiting at least fifteen minutes after using such products and rinsing your mouth with water before testing.
Paying for service
Installation, maintenance and removal are all due at the time of service. Budget for calibration visits as they come rather than expecting them bundled into a single monthly charge — though in some states they are combined.
Should you choose RoadGuard?
Is RoadGuard approved in your state?
RoadGuard is approved in many states, but availability and program requirements vary. Verify with your state licensing authority or a RoadGuard service center before signing.