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(703) 481-8785
44894 Old Ox Rd., Sterling, VA
(703) 481-6300
106 Oakgrove Rd., Unit J. | Sterling, VA

Virginia Emissions Inspections

Dulles Auto Clinic is a Certified Emissions Inspection Station and Repair Facility. Vehicle owners in the Northern Virginia counties, as well as regular commuters into the area and vehicles operating on federal installations, are subject to the emissions inspection program.

An inspection must be performed every two years and most inspections should take about 20 minutes or less. The inspector issues a vehicle inspection report after the appropriate tests are performed.

If your vehicle does not pass the inspection, necessary repairs must be made. The vehicle then must be re-inspected, which is free if performed within 14 days at the facility that performed the initial inspection. A vehicle that does not pass the re-inspection may be eligible for a waiver only if appropriate repairs were done at a Virginia certified emissions repair facility.

Localities participating in the program are as follows:

The counties of

  • Arlington
  • Fairfax
  • Loudoun
  • Prince William
  • Stafford

The cities of

  • Alexandria
  • Fairfax
  • Falls Church
  • Manassas
  • Manassas Park

A network of service stations, repair shops, motor vehicle dealers and other facilities will perform the inspections and emissions-related repairs. We generally inspect clients from Ashburn, Herndon, Reston, and other surrounding towns but we serve all of Northern Virginia.

Cost and exemptions

A vehicle emissions inspection at our facility is $28. Vehicles exempt from the inspection include motorcycles, registered antique vehicles, fire and rescue equipment, and vehicles powered exclusively by clean fuels.

Waivers - When a vehicle fails the tailpipe emissions standards or an On-Board Diagnostic (OBDII) inspection, a waiver may be obtained if a specified amount has been spent on emissions-related repairs for that vehicle. This waiver amount is set by federal law and may change periodically based on the Consumer Price Index. Repair work must be performed at a DEQ-certified emissions repair facility and performed, or supervised and approved, by a DEQ-certified emissions repair technician, no more than 60 days before the initial inspection failure. Other conditions apply. A waiver is valid for two years.

More information

Dynamometer - Exhaust emissions are tested while a vehicle operates on a treadmill-like device, called a dynamometer, at 15 mph and 25 mph only. No high-speed testing is performed. This test will be given to most 1981 and newer vehicles with a gross vehicle weight rating up to 8,500 pounds. The test is conducted by the inspector at the local testing facility.

Two Speed Idle Test - Some vehicle exhaust emissions are tested while operating
at idle and at an engine speed of 2,500 rpm. This test is only for vehicles with a gross vehicle weight rating of 8,501 to 10,000 pounds, and for 1980 and older model year vehicles or other vehicles that, because of size or other mechanical configuration, cannot be accommodated on the dynamometer.

On-Board Diagnostic II (OBD II) Inspection - Most 1996 and newer model year vehicles will be subject to a computerized analyzer check that will look for fault codes that may be present in the vehicle's on-board computer. This inspection may be performed instead of, or in some cases in addition to, the dynamometer or two speed idle test on eligible vehicles.

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