States
Maryland
Rockville

Emissions Testing in Rockville, Maryland

Find 10 licensed smog check stations in Rockville. Browse test-only centers, STAR-certified locations, and shops offering registration renewal inspections. Requirements in Maryland vary by vehicle type and model year.

10 stations
Rockville, MD
View Maryland requirements
GG

Golden Gears Automotive, Inc

5.0 · 147 reviews
Auto repair shop · 12025 Nebel St, Rockville, MD 20852

Golden Gears Automotive offers emissions testing and vehicle inspection in Rockville, Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
RA

Roda Auto Repair

4.9 · 1,064 reviews
Auto repair shop · 1460 Rockville Pike, Rockville, MD 20852

Roda Auto Repair offers emissions testing and vehicle inspection in Rockville, Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
SA

Superior Auto Service

4.8 · 350 reviews
Auto repair shop · 12298 Wilkins Ave, Rockville, MD 20852

Superior Auto Service offers emissions testing and vehicle inspection in Rockville, Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
RA

Rockville Auto Repair

4.7 · 127 reviews
Auto repair shop · 1623 E Gude Dr, Rockville, MD 20850

Rockville Auto Repair offers emissions testing and vehicle inspection in Rockville, Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
AA

AMPM Automotive

4.7 · 473 reviews
Auto repair shop · 11800 Coakley Cir, Rockville, MD 20852

AMPM Automotive offers emissions testing and vehicle inspection in Rockville Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
RE

Rockville Exxon

4.6 · 270 reviews
Auto repair shop · 11433 Rockville Pike, Rockville, MD 20852

Rockville Exxon provides emissions testing and vehicle inspection in Rockville, Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
GA

Gili's Automotive

4.6 · 412 reviews
Auto repair shop · 12410 Washington Ave, Rockville, MD 20852

Gili's Automotive offers emissions testing and vehicle inspection in Rockville, Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
OA

Ormsby Auto

4.4 · 211 reviews
Auto repair shop · 15850 Somerville Drive, Rockville, MD 20855

Ormsby Auto offers emissions testing and vehicle inspection in Rockville, Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
BA

Butler Automotive Service Center

3.7 · 52 reviews
Auto repair shop · 14720 Southlawn Ln, Rockville, MD 20850

Butler Automotive Service Center offers emissions testing and vehicle inspection in Rockville, Maryland. View hours and...

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis
RS

Rockville Service Center

3.6 · 41 reviews
Auto repair shop · 1900 Rockville Pike, Rockville, MD 20852

Rockville Service Center offers emissions testing and vehicle inspection in Rockville, Maryland. View hours and details.

emissions testing Vehicle Inspection OBD-II Diagnostics Check Engine Light Diagnosis

City Guide

Emissions Testing in Rockville, Maryland

Finding a reliable place for emissions testing or a smog check in Rockville is easier than ever. Our directory lists 10 licensed and verified emissions testing stations in the city, including STAR-certified and test-only centers where required. Whether you're renewing your registration or completing an out-of-state transfer, this page helps you quickly locate nearby inspection facilities and understand what applies in Maryland.

Do Vehicles in Rockville Need an Emissions Test?

Most drivers in Rockville follow the same rules set by Maryland. Requirements vary based on vehicle age, fuel type, and county. If you're unsure whether your ZIP code or vehicle model year requires a test, use this directory to browse local stations or review our state-specific testing requirements.

Types of Smog Check Services Available

  • Standard emissions tests for gasoline vehicles
  • OBD-II inspections for 1996+ model years
  • Tailpipe testing for older vehicles where required
  • Diesel emissions testing
  • Hybrid and electric vehicle smog checks
  • Registration renewal support
  • Test-only or STAR-certified inspections (state dependent)

Each listing includes the station's address, contact information, operating hours, and service notes to help you choose the right location.

Smog Check Tips for Rockville Drivers

Before heading to a testing center in Rockville, make sure:

  • Your check engine light is off
  • Your vehicle has completed recent drive cycles
  • The gas cap is properly sealed
  • The engine is fully warmed up
  • You have your registration and ID

Following these steps greatly increases the chance of passing on the first attempt.

Why Use This Directory?

Drivers in Rockville rely on this directory because it provides a complete list of verified emissions testing stations, map-based navigation for quick lookup, accurate state-updated requirements, support for gasoline, diesel, hybrid, and electric vehicles, and clear explanations of exemptions and frequency rules.

View Maryland Requirements

Frequently Asked Questions About Emissions Testing in Rockville, Maryland

Get answers to common questions about smog checks, testing requirements, and finding the right station in Rockville.

You can use this directory to find licensed emissions testing and smog check stations in Rockville. Browse the listings above to see addresses, contact details, and services offered, then choose the station that's most convenient for your part of the city.
It depends on Maryland's emissions testing program, your registration ZIP code, and your vehicle's model year and fuel type. Some areas of Maryland require testing, while others do not. Check your Maryland state page in this directory or your DMV's website to see if your address in Rockville is in a testing area.
Most emissions programs require testing every one or two years, usually tied to registration renewal. Some vehicles are tested more frequently, and others are exempt for the first few model years. Use the Maryland state page to see the current 2025 schedule for your vehicle type and registration area.
Prices vary by station and vehicle, but most emissions tests in Rockville fall within the typical range for Maryland. Many stations list pricing by phone or on their website, and some offer coupons or discounts. Use the listings above to contact a station directly for current pricing.
Requirements depend on vehicle type (gasoline, diesel, hybrid, electric), model year, and weight, as well as where your vehicle is registered in Maryland. In many states, fully electric vehicles are exempt, newer vehicles are temporarily exempt, and certain older or specialty vehicles may have different rules. Check the Maryland state page for the latest 2025 requirements.
Most stations in Rockville ask you to bring your current registration or renewal notice, a valid photo ID, and proof of insurance if required by Maryland. Make sure your vehicle is warmed up and the check engine light is off before you arrive.
If your vehicle fails, the station will provide a report showing the reason for failure (such as stored OBD-II codes or high tailpipe readings). In most programs, you must complete repairs and pass a retest before renewing your registration. Some states offer repair assistance, cost caps, or waivers. Details are listed on the Maryland page in this directory.
In some states, certain vehicles are directed to specific station types (such as STAR or test-only centers). Unless your renewal notice or DMV instructions say otherwise, you can usually choose any licensed station in Rockville. If you're unsure, ask the station when you call or check the instructions on your renewal notice.

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