Maryland State Inspection Station Rockville MD

Butler Automotive Service Center in Rockville MD is an Authorized Maryland State Inspection station not only for passenger cars and trucks but also for a number of other classes of vehicles. Most Maryland State Inspection stations are authorized to inspect vehicles that fall into the Class A category but trailers, large trucks, motorcycles, buses and RV’s require additional certification in which Butler is authorized.

Class A - Passenger vehicles, limousines, recreational motor homes, trucks 10,000 pounds and under GVWR, trailers not equipped with air brakes, up to 20 feet in length, and multipurpose passenger vehicles, except 3-wheeled multipurpose vehicles.

Class B - Any trailer, including those equipped with air brakes.

Class C - Trucks, truck tractors, buses, recreational motor homes, converted buses, and limousines over 10,000 pounds GVWR.

Class M - Motorcycles and 3-wheeled multipurpose vehicles, and trailers 20 feet or less in length, if the trailers are not equipped with air brakes.

To obtain an inspection certificate, you must have your vehicle inspected at an authorized safety inspection station in Maryland. Call or email today to schedule your MD State Inspection.

Vehicle Parts or Systems to be Inspected

Vehicles - GVWR Equal to or Less Than 10,000 Pounds
(form #23-21)

  • Steering system
  • Wheel alignment
  • Suspension
  • Brake system
  • Wheels / tires
  • Fuel system
  • Exhaust system
  • Bumpers
  • Fenders
  • Lights
  • Electrical system
  • Mirrors
  • Glazing (windows)
  • Wipers
  • Hood / catches
  • Door handle latches
  • Floor / trunk pans
  • Speedometer / odometer
  • Driver seat
  • Safety belts
  • Motor mounts
  • Gear shift indicator
  • Universal and CV (constant velocity) joints
  • Emissions equipment

Trailer
(form #23-21B)

  • Hitches
  • Suspension
  • Brake system
  • Emergency brakes
  • Wheels / tires
  • Rear metal frame
  • Rear wheel flaps
  • Lights
  • Electrical system
  • Fenders

Motorcycle and 3-Wheel MPV
(form #23-21C)

  • Steering system
  • Frame
  • Brake system
  • Wheels / tires
  • Fuel system
  • Exhaust system
  • Lights
  • Electrical system
  • Mirrors
  • Windshield
  • Passenger items (hand hold and foot rest)
  • Body items (seat, engine mounts, stand, chain and guard, fenders)
  • Speedometer / odometer

Vehicles - GVWR Over 10,000 Pounds
(form #23-21A)

  • Steering system
  • Wheel alignment
  • Suspension
  • Brake system
  • Wheels / tires
  • Fuel system
  • Exhaust system
  • Bumpers / rear frame
  • Rear wheel flaps
  • Fenders
  • Lights
  • Electrical system
  • Mirrors
  • Glazing (windows)
  • Wipers
  • Hood / catches
  • Door handle latches
  • Floor / trunk pans
  • Speedometer / odometer