Top Rated Smog Test Shops Serving Marshall, CA

If you really care about choosing a quality smog test shop, we’re here for you. Here’s your access to the best smog test shops serving Marshall including 94940. These smog test experts provide emission testing equipment and tailpipe emissions, and they also work on emission limits, emissions testing and smog check requirements. For 22 years we’ve conducted the most accurate ratings and deepest research of local shops, so you’ll be confident in choosing.

Last Updated May 15, 2026
8,530 people sourced companies in Auto Smog
1,449 Verified Auto Smog Customers Surveyed

1,449

8,530

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MSI Automotive

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MSI Automotive (also known to many customers as Marin Sports & Imports, Inc.) provides a wide range of maintenance and repair services for Japanese, A...

Main Services

Auto Repair

Additional Services

Brakes, Smog Certification, Maintenance, Repair, Domestic, Foreign

Coverage Areas

Marin County

Family Owned

Special Discount

Same-Day Service

Coupon on Website

Diamond Certified Video Profile

Auto Repair - MSI Automotive - Marin County

Diamond Certified Company Report

MSI Automotive’s staff works on all types of vehicles.

Expert Contributions

693
Rating Surveys

6
Photos
& Videos

5
Researched Articles

Rated Highest in Quality and Helpful Expertise PERFORMANCE GUARANTEED

Quick Connect
(415) 690-7955

123 Jordan Street, San Rafael, CA 94901

Hours CLOSED NOW

License:

192161

Learn how to choose a Auto Smog and more…

Diamond Certified Smog Test Shops Serve These Marshall ZIP Codes

94940

Diamond Certified Smog Test Shops In Marshall

Diamond Certified smog test shops serving Marshall are rated an average of 4.7 out of 5 stars based on 1624 reviews of 16 rated smog test shops.
Diamond Certified smog test shops in Marshall Avg. Star Rating.

We make you an expert at choosing a high-quality smog test shop in the Marshall area.

For those who love quality local smog test shops.

Within our Diamond Certified Resource:

You choose from only top rated Diamond Certified smog test shops that serve our Marshall area.
You see each shop’s deeply researched report from our research.
You get guidance throughout every phase of hiring a local smog test shop with our Diamond Certified Resource Car Repairs and Maintenance Guide.
You get expert guidance from top rated smog test shops who are Expert Contributors.
You’re backed by our Performance Guarantee.

You’ll love and refer your friends and family to your new Marshall area Diamond Certified smog test shop. They provide expert services, including inspection and maintenance (I/M) program, emission limits, OBD-II (on-board diagnostics) systems, catalytic converters, tailpipe emissions, and more.

To qualify for Diamond Certified, each shop must score Highest in Quality and Helpful Expertise (a 90+ on a 100 scale) and pass all our credential-based ratings. Diamond Certified smog test shops that serve Marshall residents include All Autos, Inc., MSI Automotive, and Collie Autoworks.

Every Diamond Certified smog test shop that serves residents in 94940 performs various specialties, including emission control devices, smog check requirements, pollution control measures, exhaust emissions, and vehicle inspection programs.

How to Choose a Quality Marshall Smog Test Shop for Your Family

Click the name of the shop to get to their Diamond Certified Company Report page.
Watch their Diamond Certified Video Profile and other videos that we’ve created for you.
Read their verbatim customer survey responses and our researched articles.
Get helpful smog tips if they are a Diamond Certified Expert Contributor.
Call or email them to schedule an appointment.

Become a Diamond Certified Preferred Member and Join Your Marshall Neighbors

If you love quality local shops, this is for you. Become a Diamond Certified Preferred Member (always free) and get a double performance guarantee, extra guides and tips, our annual Diamond Certified Directory, and more.

Your Diamond Certified Resource. We make you an expert at choosing.

We make you an expert at choosing local companies by giving you the most accurate ratings, deeply researched company reports and Diamond Certified Guide of all Resource Guides, which cover 70+ industries in the Auto, Home, Health and Personal service categories. Each guide contains 16 key articles that are separated into “Before, During and After the Job” tabs. These are written to guide you through each phase of hiring, starting, managing and ending a job in that specific type of service.

Diamond Certified Resource Compared to Crowd-Sourced Review Sites

Diamond Certified Resource’s ratings of local companies are based on surveys of only verified real customers, so they are the most accurate. This beats crowd-sourced review sites like Yelp, Angi or even Google that are plagued with fake, manipulated, cherry-picked and non-customer reviews, which produce inaccurate and often inflated rating scores.

Diamond Certified Resource’s deeply researched reports of top rated Diamond Certified companies include everything you need to see to be very confident in choosing a top rated local company. Each company report includes detailed quality ratings and scoring, verbatim customer survey responses, a profile video, a company story video, a capabilities table, a photo gallery, researched articles, unique expert contributions from the company’s owner, and more. This beats crowd-sourced review sites that solicit companies to “claim their business listing” and add any type of info to their profiles. This sounds good, but it has led to company profiles that are littered with false claims and incomplete info.

Marshall was founded in 1872, and today, your 2,135 neighbors enjoy coastal trail walking, winery tours, arcades, sunbathing and scootering. Marshallians use Diamond Certified smog test shops for emissions testing, smog certification, vehicle emissions standards, smog check requirements, diesel smog, and more.

Frequently Asked Questions for Auto Smog in Marshall, CA

Q: What are customers of Diamond Certified smog test shops saying about shops in Marshall, CA?

A: Verified MSI Automotive Customer, 1 of 693
"I believe they are trustworthy and really knowledgeable. They always do a good job. I like the people there. I like Marty. She's at the front desk. They're really personable, and Curtis is really personable. They're not corporate, they're a local business. They're good people, and they're good at what they do. They're kind of perfect." - Barbara S.
All Survey Responses for MSI Automotive

Q: What are some of the most popular brands that Diamond Certified smog test shops use when working with Marshall residents?

A: Diamond Certified smog test shops use top-quality brands like MagnaFlow, Vibrant Performance, Corsa, Flowmaster and aFe Power.

Q: What types of obd-ii (on-board diagnostics) system do smog test shops offer?

A: Smog test shops typically offer two types of diesel smog tests: a tailpipe test and a visual inspection. The tailpipe test is a computerized test that measures the exhaust emissions of a diesel vehicle and compares the results to the standards set by the Environmental Protection Agency (EPA). The visual inspection looks for visible signs of modification and tampering to the vehicle’s emissions control system. Both tests are used to make sure that diesel vehicles meet the EPA's emissions standards.

Q: Can Diamond Certified smog test shops work with MagnaFlow products and similar items so I can get emission testing equipment in Marshall?

A: Yes, Diamond Certified smog test shops in Marshall can work with MagnaFlow products and similar items to provide emission testing equipment.

Q: What did people search for when they wanted to find the best quality smog test shops in Marshall?

A: Tailpipe Emissions
Emission Testing Equipment
Emissions Testing
Diesel Smog
Emissions Testing

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