Smog Guys, formerly known as MM STAR SMOG, has been serving the community since 2013 and relocated in December 2019. This business is staffed by ASE-certified mechanics who are approved by the State of California, the EPA, and the Department of Consumer Affairs to conduct smog checks on vehicles. With nearly 53 years of combined experience, they are dedicated to helping reduce exhaust emissions from older cars and ensuring compliance with state laws. Customers praise Smog Guys for their amazing service, quick turnaround, and professionalism, often completing smog checks in less than 30 minutes. Many loyal clients consistently return, appreciating the honesty and integrity of the team. Smog Guys also offers DMV services, making it a convenient one-stop shop for vehicle needs.
Friendly and professional service Thank you Marcelo mgr and Juliana at front desk
February 2026
Juliana and the crew at Smog Guys in Concord were absolutely fabulous!!! Great customer service, fast efficient. I was in and out without any hassle. I highly recommend them to anyone needing smog services.
January 2026
Brought my husband here after him being a loyalist to another company for a decade. The staff has totally flipped especially Juliana
