Services

Diagnose first. Fix what's needed.

From a check-engine light to a timing belt, every job starts with a proper diagnosis and a written estimate. Cars, light trucks, vans, and work trucks — all makes.

Service

Virginia emissions repair

Adam Auto Works specializes in Virginia emissions repair. If your vehicle failed its Northern Virginia emissions inspection, we diagnose the actual cause — check-engine codes, oxygen sensors, catalytic converters, EVAP leaks, EGR faults, misfires — repair it to factory specification, and get you ready for the re-test.

Check-engine light diagnosis
Oxygen and air-fuel sensors
Catalytic converters
EVAP system leaks (loose gas cap to purge valves)
EGR valves and passages
Misfire and fuel-trim corrections
Readiness-monitor drive cycles

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Service

Virginia state safety inspection

We are a licensed Virginia state safety inspection station. Bring your car in for the annual inspection Monday through Saturday; most inspections are done while you wait. If something fails, we explain exactly what and why, give you a written estimate, and can complete the repair and re-inspection the same visit.

Annual Virginia safety inspection
Brakes, tires, steering, and suspension check
Lights, wipers, horn, mirrors, and glass
Exhaust system and fuel system
Same-visit repair and re-inspection

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Service

Computer diagnostics & drivability

Our diagnostic system reads all makes. We pull codes, look at live data, and test the suspect part before recommending a repair — so you pay to fix the problem, not to guess at it. Drivability complaints, intermittent faults, electrical and charging problems, and fuel-injection issues are everyday work here.

Check-engine and warning lights
Engine performance and drivability
Electrical and charging-system diagnosis
Fuel-injection and fuel-system diagnosis
Oil-leak and coolant-leak diagnosis
Battery testing (we test batteries free)

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Service

Brakes, suspension & steering

Brake noise, pulling, pulsing, or a soft pedal gets checked the same day whenever we can. We replace only what has actually worn: pads and rotors, calipers, hoses, and fluid; shocks and struts; control arms, tie rods, ball joints; CV axles and boots; wheel bearings and hubs.

Brake pads, rotors, calipers, and fluid flush
Shocks and struts
Control arms, tie rods, ball joints
CV axles and boot replacement
Wheel bearings and hubs
Power steering

Call about brakes, suspension & steering

Service

Engine, cooling & transmission

The heavy mechanical work most shops send out, we do in-house: timing belts and chains, cylinder-head gaskets, valve-cover gaskets and valve adjustments, water pumps, radiators and hoses, drive belts, exhaust, transmission service and repair, clutches, differentials and U-joints.

Timing belts and chains
Head gaskets, valve-cover gaskets, valve adjustments
Water pumps, radiators, hoses, cooling systems
Belts and exhaust systems
Transmission service and repair, clutches
Differentials, drivetrain, U-joints

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Technicians performing scheduled maintenance

Service

Oil changes & scheduled maintenance

Maintenance done here to the manufacturer's schedule protects your new-car warranty just as dealer service does. Oil and filter changes, factory-interval services, filters, fluids, spark plugs and tune-ups, wipers, lighting, and BG Products fluid services for engines, transmissions, cooling systems, and fuel systems.

Oil and filter changes (conventional, blend, full synthetic)
Factory scheduled maintenance (30k / 60k / 90k)
Tune-ups, spark plugs, filters, fluids
BG Products engine, transmission, cooling, and fuel-system services
Wipers, bulbs, and batteries

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Service

Air conditioning & heating

Weak A/C in a Northern Virginia summer usually means a leak, not just low refrigerant. We find the leak, repair it, and recharge to specification. Compressors, condensers, blower motors, heater cores, and ventilation problems are all handled in-house.

A/C performance check and recharge
Leak detection and repair
Compressors and condensers
Heater cores and blower motors
Cabin air filters

Call about air conditioning & heating

Service

Tires

Tire mounting and balancing, rotations, patch and plug repairs, and honest wear inspections. We will tell you when a tire is safe for another season and when it is not.

Mounting and balancing
Rotation
Flat repair (patch and plug)
Wear and pressure inspection

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Mack dump truck inside the shop for repair

Service

Work trucks & heavy-duty

Our bays and lifts handle more than sedans. Contractors and small fleets in Loudoun County bring us pickups, vans, box trucks, and dump trucks for inspections, brakes, maintenance, and repairs. Ask about scheduling fleet work around your jobs.

Pickups, vans, and box trucks
Dump trucks and medium-duty work trucks
Fleet inspections and maintenance
Brakes, suspension, and drivetrain

Call about work trucks & heavy-duty

Everything we service

A to Z.

If it is not on this list, call — it probably is something we do. Some work, such as airbag systems and high-voltage EV battery repair, has to go to the dealer, and we will tell you so up front rather than charge you to find out.

Air conditioning, ventilation & heating
Battery, charging & starting systems
Belts
Brakes
Clutch
Cooling systems
CV axle & boot replacement
Cylinder head gaskets
Differential
Drive & fan belts
Drivetrain
Electrical diagnosis
Emission system
Engine cooling system
Engine performance diagnosis
Exhaust system
Factory scheduled maintenance
Filters
Fluids
Fuel injection diagnosis
Fuel system
Glass & windshields
Hoses
Lighting
Oil & filter change
Oil leak diagnosis
Power steering
Preventive maintenance
Shocks & struts replacement
Suspension
Steering
Timing belts & chains
Tires
Transmission
Tune-ups
U-joints
Valve adjustments / cover gaskets
Virginia emissions repair
Virginia state safety inspection
Water pumps, radiators, hoses
Wipers

FAQ

Good to know.

Does servicing my car at an independent shop void the warranty?

No. Under federal law (the Magnuson-Moss Warranty Act) a manufacturer cannot void your warranty because maintenance was done at an independent shop. We perform every service to factory standards and specifications, keep records, and use dealer or OEM-quality parts, so your warranty stays intact.

Do you give written estimates?

Yes. We diagnose first, explain what we found, and give you a written estimate before any work begins. If something else turns up during the job, we call before proceeding.

What parts do you use?

Dealer parts and OEM-quality aftermarket parts, depending on the repair and your preference. We tell you which is being used and why.

Can I drop my car off after hours?

Yes. Night drop is available — leave the key in the drop box with a note describing the problem and your phone number, and we will call you in the morning.

Where are you located?

In the Elmwood Court business park in Sterling, Virginia — 45759 Elmwood Ct, Unit 125, minutes from Route 28. Convenient to Ashburn, Herndon, Reston, Dulles, and Leesburg.

Call the shop. Talk to the people who do the work.

Written estimate before any work. Same-day service whenever the schedule allows. Saturday hours and night drop for busy weeks.

(703) 421-0003 Hours & directions