States
Maryland
Gaithersburg

Emissions Testing in Gaithersburg, Maryland

Find 8 licensed smog check stations in Gaithersburg. Browse test-only centers, STAR-certified locations, and shops offering registration renewal inspections. Requirements in Maryland vary by vehicle type and model year.

8 stations
Gaithersburg, MD
View Maryland requirements
WA

Winkler Automotive Service Center

4.7 · 396 reviews
Car repair and maintenance service · 401 E Diamond Ave, Gaithersburg, MD 20877

Winkler Automotive offers emissions testing and vehicle inspection in Gaithersburg, Maryland. View hours and details.

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

Inspection Plus

4.7 · 161 reviews
Auto repair shop · 7615-A Rickenbacker Dr, Gaithersburg, MD 20879

Inspection Plus offers emissions testing and vehicle inspection in Gaithersburg, Maryland. View hours and details.

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

Safety Car Auto Services

4.6 · 107 reviews
Auto repair shop · 19050 Woodfield Rd Ste B, Gaithersburg, MD 20879

Safety Car Auto Services offers emissions testing and vehicle inspection in Gaithersburg, Maryland. View hours and detai...

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

Safety Inspection And Auto Repair

4.3 · 50 reviews
Car inspection station · 7887 Cessna Ave, Gaithersburg, MD 20879

Safety Inspection And Auto Repair offers emissions testing and vehicle inspection in Gaithersburg, Maryland. View hours...

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

Darnestown Shell

4.3 · 62 reviews
Auto repair shop · 14020 Darnestown Rd, Gaithersburg, MD 20878

Darnestown Shell offers emissions testing and vehicle inspection in Gaithersburg Maryland. View hours and details.

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

Auto Check & Inspection Llc

4.0 · 4 reviews
Auto repair shop · 7615-H, Rickenbacker Dr, Gaithersburg, MD 20879

Auto Check & Inspection Llc offers emissions testing and vehicle inspection in Gaithersburg Maryland. View hours and det...

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

Montgomery Shell Auto Service

4.0 · 106 reviews
Auto repair shop · 455 N Frederick Ave, Gaithersburg, MD 20877

Montgomery Shell Auto Service offers emissions testing and vehicle inspection in Gaithersburg Maryland. View hours and d...

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

Flower Hill Liberty Auto Center

3.7 · 87 reviews
Auto repair shop · 18267 Flower Hill Way, Gaithersburg, MD 20879

Flower Hill Liberty Auto Center offers emissions testing and vehicle inspection in Gaithersburg, Maryland. View hours an...

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

City Guide

Emissions Testing in Gaithersburg, Maryland

Finding a reliable place for emissions testing or a smog check in Gaithersburg is easier than ever. Our directory lists 8 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 Gaithersburg Need an Emissions Test?

Most drivers in Gaithersburg 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 Gaithersburg Drivers

Before heading to a testing center in Gaithersburg, 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 Gaithersburg 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 Gaithersburg, Maryland

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

You can use this directory to find licensed emissions testing and smog check stations in Gaithersburg. 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 Gaithersburg 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 Gaithersburg 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 Gaithersburg 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 Gaithersburg. If you're unsure, ask the station when you call or check the instructions on your renewal notice.

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