Ignition interlock installers in Maryland

354 installer locations in 134 Maryland cities, 240 of them verified against both the provider and Google Maps. Brands installed in Maryland: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock, Guardian Interlock. 103 shops list Saturday hours and 14 offer mobile installation.

BrandOpen todayOpen SaturdayMobile install354 of 354 shops

Confirmed: provider page and Google Maps agree
Listed: one source
Unconfirmed: only a closed Google listing

1 shops are not on the map yet because we do not have coordinates for them. They still appear in the city lists below.

What it costs in Maryland

Published starting prices

Provider	Install	Monthly lease	Calibration	Removal	6 month floor	12 month floor
Intoxalock	$29.99	$49.99 to $74.99	Not published	Not published	from $330*	from $630*
LifeSafer	Not published	$90	Not published	Not published	from $540*	from $1,080*

These are the lowest figures each provider publishes, so the 6 and 12 month totals are a floor, not a quote. They add the install fee, the monthly lease, calibration visits and removal where published. An asterisk means a fee is not published and is not included. Per day rates are counted as 30 days a month.

Intoxalock: provider published intoxalock.com/state-requirements/maryland, October 27, 2026
LifeSafer: provider published lifesafer.com/maryland/pricing, October 27, 2026

Reported totals usually run two to three times the published floor. Calibration visits, device protection, data fees and missed-appointment charges are rarely in the headline price.

What people report paying

Provider	Reported	Date	Source
Low Cost Interlock	$897 for 6 months6-month total quoted by phone	April 15, 2026	r/dui on reddit.com
Intoxalock	$899 for 6 months6-month total quoted by phone	April 15, 2026	r/dui on reddit.com
RoadGuard Interlock	$1,000 for 6 months6-month total quoted by phone	April 15, 2026	r/dui on reddit.com
LifeSafer	$1,070 for 6 months6-month total quoted by phone	April 15, 2026	r/dui on reddit.com
Smart Start	$1,160 for 6 months6-month total quoted by phone	April 15, 2026	r/dui on reddit.com

Reported by visitors and public forum posts, as quoted to them. Not checked against the provider and not combined with the published figures above.

Full cost breakdown for Maryland

Report your fees

Cities in Maryland (134)Show or hide

Aberdeen (6)
Abingdon (1)
Accokeek (1)
Annapolis (4)
Baltimore (33)
Bel Air (5)
Beltsville (4)
Berlin (3)
Bethesda (1)
Bowie (2)
Brooklyn (1)
Brooklyn Park (1)
Buckeystown (1)
California (1)
Cambridge (4)
Capital Heights (1)
Capitol Heights (1)
Catonsville (5)
Cecilton (1)
Centreville (2)
Chesapeake Beach (1)
Chestertown (3)
Cheverly (1)
Churchville (1)
Clinton (5)
Cockeysville (1)
College Park (2)
Columbia (6)
Crofton (1)
Cumberland (5)
Darlington (1)
Darnestown (1)
Deale (1)
Delmar (2)
Denton (2)
Derwood (1)
District Heights (1)
Dundalk (4)
Dunkirk (1)
Easton (5)
Edgewater (2)
Edgewood (1)
Elkridge (1)
Elkton (4)
Ellicott City (3)
Emmitsburg (1)
Essex (6)
Finksburg (2)
Forestville (1)
Fort Washington (3)
Frederick (15)
Frostburg (1)
Fruitland (1)
Gaithersburg (5)
Gambrills (2)
Germantown (3)
Glen Burnie (10)
Grasonville (1)
Greensboro (1)
Gwynn Oak (2)
Hagerstown (9)
Hampstead (1)
Hanover (1)
Havre De Grace (2)
Hillcrest Hgts (1)
Hughesville (3)
Hunt Valley (1)
Huntingtown (1)
Hurlock (1)
Hyattstown (1)
Hyattsville (3)
Jarrettsville (1)
Jessup (2)
Joppa (2)
Kensington (3)
Kingsville (1)
La Plata (1)
Landover (1)
Laurel (7)
Lexington Park (6)
Lothian (1)
Lusby (1)
Lutherville (2)
Manchester (3)
Mechanicsville (1)
Middle River (3)
Middletown (2)
Monrovia (1)
Mount Airy (2)
Oakland (1)
Ocean City (3)
Odenton (3)
Owings Mills (3)
Oxon Hill (2)
Parkville (7)
Pasadena (1)
Perryville (1)
Phoenix (1)
Pikesville (1)
Pittsville (1)
Potomac (1)
Prince Frederick (1)
Queenstown (1)
Randallstown (3)
Rawlings (1)
Reisterstown (1)
Rising Sun (1)
Rockville (9)
Rosedale (1)
Salisbury (6)
Seabrook (1)
Severna Park (3)
Sharpsburg (1)
Silver Spring (7)
Smithsburg (1)
Stevensville (1)
Sykesville (2)
Takoma Park (2)
Taneytown (1)
Temple Hills (2)
Thurmont (1)
Tilghman (1)
Towson (5)
Upper Marlboro (6)
Waldorf (6)
Westminster (3)
Wheaton (1)
White Marsh (1)
White Plains (2)
Whiteford (1)
Williamsport (1)
Windsor Mill (2)
Woodbine (1)
Worton (1)

Aberdeen, MD

6 installers, 4 verified. Brands: Intoxalock, Smart Start, LifeSafer.

Abingdon, MD

1 installer, 1 verified. Brands: LifeSafer.

Next Generation Mechanic

Accokeek, MD

1 installer, 1 verified. Brands: LifeSafer.

Directlink Auto Llc

Annapolis, MD

4 installers, 2 verified. Brands: Smart Start, LifeSafer, Low Cost Interlock, Guardian Interlock.

Baltimore, MD

33 installers, 21 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, Guardian Interlock.

Bel Air, MD

5 installers, 3 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock, Guardian Interlock.

Beltsville, MD

4 installers, 2 verified. Brands: Intoxalock, Smart Start, LifeSafer.

Berlin, MD

3 installers, 1 verified. Brands: Intoxalock, Smart Start, LifeSafer, Guardian Interlock.

Bethesda, MD

1 installer, 1 verified. Brands: LifeSafer.

Ignition Interlock - Bethesda

Bowie, MD

2 installers, 2 verified. Brands: Intoxalock, LifeSafer.

Brooklyn, MD

1 installer, 1 verified. Brands: LifeSafer.

Honest Contracting Llc

Brooklyn Park, MD

1 installer, 1 verified. Brands: Smart Start.

ASAP Tag & Title Services

Buckeystown, MD

1 installer. Brands: LifeSafer.

LifeSafer Ignition Interlock

California, MD

1 installer, 1 verified. Brands: LifeSafer.

Ignition Interlock - California

Cambridge, MD

4 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Capital Heights, MD

1 installer, 1 verified. Brands: Smart Start, LifeSafer, Low Cost Interlock.

Auto Xpressions Customs

Capitol Heights, MD

1 installer, 1 verified. Brands: Intoxalock.

Freestate Auto and Truck Service Inc.

Catonsville, MD

5 installers, 2 verified. Brands: Intoxalock, Smart Start, Low Cost Interlock.

Cecilton, MD

1 installer. Brands: Intoxalock.

Intoxalock Ignition Interlock

Centreville, MD

2 installers, 1 verified. Brands: Intoxalock, Smart Start, LifeSafer.

Chesapeake Beach, MD

1 installer, 1 verified. Brands: LifeSafer.

Ignition Interlock - Chesapeake Beach

Chestertown, MD

3 installers, 2 verified. Brands: Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock.

Cheverly, MD

1 installer, 1 verified. Brands: Smart Start.

SYNMED CARE MEDICAL

Churchville, MD

1 installer, 1 verified. Brands: Smart Start, Low Cost Interlock.

Auto & Truck Unlimited

Clinton, MD

5 installers, 5 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock.

Cockeysville, MD

1 installer. Brands: Smart Start.

Smart Start (In AMG Auto and Truck Repair)

College Park, MD

2 installers, 2 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock.

Columbia, MD

6 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Crofton, MD

1 installer. Brands: Smart Start.

Aftermarket Installation Services LLC

Cumberland, MD

5 installers, 3 verified. Brands: Intoxalock, Smart Start, RoadGuard Interlock.

Darlington, MD

1 installer. Brands: Smart Start.

Innovative Mobile Solutions

Darnestown, MD

1 installer, 1 verified. Brands: Intoxalock.

Wilniq Auto Body & Mechanical Repairs

Deale, MD

1 installer. Brands: Intoxalock.

Intoxalock Ignition Interlock

Delmar, MD

2 installers, 1 verified. Brands: Intoxalock, Smart Start.

Denton, MD

2 installers, 2 verified. Brands: Intoxalock, Smart Start, LifeSafer, Guardian Interlock.

Derwood, MD

1 installer, 1 verified. Brands: LifeSafer.

Santana Automotive & Tire Service

District Heights, MD

1 installer. Brands: Smart Start.

Infinity Auto Works

Dundalk, MD

4 installers, 3 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, Guardian Interlock.

Dunkirk, MD

1 installer, 1 verified. Brands: Intoxalock.

TownSquare Auto - Dunkirk

Easton, MD

5 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Edgewater, MD

2 installers, 2 verified. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Edgewood, MD

1 installer, 1 verified. Brands: Smart Start, Low Cost Interlock.

Hook It Up Performance

Elkridge, MD

1 installer, 1 verified. Brands: LifeSafer.

Bwi Motorsports

Elkton, MD

4 installers, 2 verified. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Ellicott City, MD

3 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer.

Emmitsburg, MD

1 installer. Brands: Smart Start.

East Park Automotive

Essex, MD

6 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, Guardian Interlock.

Finksburg, MD

2 installers, 1 verified. Brands: Intoxalock, LifeSafer.

Forestville, MD

1 installer, 1 verified. Brands: Smart Start, LifeSafer, Guardian Interlock.

Tricked Out Auto Services

Fort Washington, MD

3 installers, 2 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock.

Frederick, MD

15 installers, 10 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock, Guardian Interlock.

Frostburg, MD

1 installer, 1 verified. Brands: Intoxalock.

KK Auto Sales

Fruitland, MD

1 installer, 1 verified. Brands: Intoxalock.

Auto Medic Towing & Repair

Gaithersburg, MD

5 installers, 4 verified. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Gambrills, MD

2 installers, 1 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Germantown, MD

3 installers, 2 verified. Brands: Intoxalock, Smart Start, Low Cost Interlock.

Glen Burnie, MD

10 installers, 5 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock, Guardian Interlock.

Grasonville, MD

1 installer, 1 verified. Brands: Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Ignition Interlock - Grasonville

Greensboro, MD

1 installer, 1 verified. Brands: Intoxalock.

JP Automotive LLC

Gwynn Oak, MD

2 installers, 2 verified. Brands: Intoxalock, Smart Start.

Hagerstown, MD

9 installers, 6 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock, Guardian Interlock.

Hampstead, MD

1 installer, 1 verified. Brands: LifeSafer.

Hampstead Performance

Hanover, MD

1 installer. Brands: Smart Start.

B&JJ Auto Repair LLC.

Havre De Grace, MD

2 installers, 1 verified. Brands: Intoxalock, LifeSafer.

Hillcrest Hgts, MD

1 installer, 1 verified. Brands: Intoxalock.

Silver Hill Auto Repair & Sale

Hughesville, MD

3 installers, 2 verified. Brands: Intoxalock, Smart Start, LifeSafer.

Hunt Valley, MD

1 installer, 1 verified. Brands: Intoxalock, Smart Start.

Precision Tune Auto Care of Hunt Valley

Huntingtown, MD

1 installer, 1 verified. Brands: Smart Start, LifeSafer, RoadGuard Interlock.

Ignition Interlock - Huntingtown

Hurlock, MD

1 installer, 1 verified. Brands: Intoxalock, RoadGuard Interlock.

C&C Repair

Hyattstown, MD

1 installer, 1 verified. Brands: Smart Start, Low Cost Interlock.

Burdette Brothers Inc

Hyattsville, MD

3 installers, 3 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, Guardian Interlock.

Jarrettsville, MD

1 installer. Brands: Smart Start.

Majar Automotive

Jessup, MD

2 installers, 1 verified. Brands: LifeSafer.

Joppa, MD

2 installers, 2 verified. Brands: Intoxalock, LifeSafer.

Kensington, MD

3 installers, 2 verified. Brands: Intoxalock, LifeSafer, Guardian Interlock.

Kingsville, MD

1 installer, 1 verified. Brands: Intoxalock.

G and M Automotive

La Plata, MD

1 installer, 1 verified. Brands: LifeSafer.

Ignition Interlock - La Plata

Landover, MD

1 installer, 1 verified. Brands: Smart Start, Low Cost Interlock.

F & D Auto Repair

Laurel, MD

7 installers, 6 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock.

Lexington Park, MD

6 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock.

Lothian, MD

1 installer. Brands: Smart Start.

Lothian Automotive, Inc.

Lusby, MD

1 installer, 1 verified. Brands: LifeSafer.

Ignition Interlock - Lusby

Lutherville, MD

2 installers, 1 verified. Brands: Smart Start.

Manchester, MD

3 installers, 2 verified. Brands: Smart Start, LifeSafer.

Mechanicsville, MD

1 installer, 1 verified. Brands: Intoxalock.

Kurtzs Auto Repair

Middle River, MD

3 installers, 2 verified. Brands: Intoxalock, Smart Start.

Middletown, MD

2 installers, 2 verified, 1 with mobile install. Brands: Intoxalock, Smart Start.

Monrovia, MD

1 installer. Brands: Intoxalock.

Intercoastal Automotive

Mount Airy, MD

2 installers, 2 verified. Brands: Intoxalock, Smart Start.

Oakland, MD

1 installer, 1 verified. Brands: LifeSafer.

Pifers Automotive And Collision

Ocean City, MD

3 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock.

Odenton, MD

3 installers, 2 verified. Brands: Intoxalock, Smart Start, LifeSafer.

Owings Mills, MD

3 installers, 2 verified. Brands: Smart Start, LifeSafer.

Oxon Hill, MD

2 installers, 1 verified. Brands: Smart Start, LifeSafer.

Parkville, MD

7 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock, Guardian Interlock.

Pasadena, MD

1 installer, 1 verified. Brands: Intoxalock, Smart Start.

Car Worx - Pasadena

Perryville, MD

1 installer. Brands: Intoxalock.

Intoxalock Ignition Interlock

Phoenix, MD

1 installer, 1 verified. Brands: Intoxalock, LifeSafer.

Jacksonville Sunoco

Pikesville, MD

1 installer, 1 verified. Brands: Intoxalock.

B and T Auto Center

Pittsville, MD

1 installer. Brands: Intoxalock.

Intoxalock Ignition Interlock

Potomac, MD

1 installer, 1 verified. Brands: LifeSafer.

Ignition Interlock - Potomac

Prince Frederick, MD

1 installer, 1 verified. Brands: Intoxalock, LifeSafer.

Platinum Sounds and Rims

Queenstown, MD

1 installer, 1 verified. Brands: Intoxalock.

Parks Tire and Auto Service Inc

Randallstown, MD

3 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock.

Rawlings, MD

1 installer, 1 verified. Brands: Intoxalock.

G&G AutoMax

Reisterstown, MD

1 installer, 1 verified. Brands: Intoxalock, Smart Start, Low Cost Interlock.

Mobile Dealer Solutions

Rising Sun, MD

1 installer. Brands: Smart Start.

Graybeals Auto Repair

Rockville, MD

9 installers, 8 verified, 2 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock.

Rosedale, MD

1 installer. Brands: Smart Start.

Community Tag and Title Services

Salisbury, MD

6 installers, 4 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Seabrook, MD

1 installer, 1 verified. Brands: LifeSafer.

Streamline Auto Sounds

Severna Park, MD

3 installers, 3 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock, Guardian Interlock.

Sharpsburg, MD

1 installer. Brands: Intoxalock.

Intoxalock Ignition Interlock

Silver Spring, MD

7 installers, 3 verified. Brands: Intoxalock, Smart Start, LifeSafer, Low Cost Interlock, RoadGuard Interlock.

Smithsburg, MD

1 installer, 1 verified. Brands: Intoxalock.

Haberlein Automotive LLC

Stevensville, MD

1 installer, 1 verified. Brands: LifeSafer, Guardian Interlock.

Ignition Interlock - Stevensville

Sykesville, MD

2 installers, 2 verified. Brands: Intoxalock.

Takoma Park, MD

2 installers, 1 verified. Brands: Smart Start, Low Cost Interlock.

Taneytown, MD

1 installer. Brands: Smart Start.

Dean Automotive Inc

Temple Hills, MD

2 installers, 1 verified. Brands: Smart Start, LifeSafer, Guardian Interlock.

Thurmont, MD

1 installer. Brands: Smart Start.

D&J Auto Enterprises/New Bill's Auto Body

Tilghman, MD

1 installer. Brands: Intoxalock.

Intoxalock Ignition Interlock

Autoserv

White Marsh, MD

1 installer. Brands: Intoxalock.

Platinum Auto and Truck Center, LLC

White Plains, MD

2 installers, 2 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, Low Cost Interlock.

Whiteford, MD

1 installer, 1 verified. Brands: LifeSafer.

Mobile Auto Service

Williamsport, MD

1 installer. Brands: Intoxalock.

Intoxalock Ignition Interlock

Windsor Mill, MD

2 installers, 1 verified. Brands: LifeSafer.

Woodbine, MD

1 installer, 1 verified. Brands: Intoxalock.

Lisbon Auto Repair

Worton, MD

1 installer, 1 verified. Brands: Intoxalock.

Rells Auto Repair