Founded in 2019, Diablo Smog and Auto Works is a family-owned and operated Star Certified Test Only Smog Shop, Located in the heart of beautiful Lafayette, CA.

As Lafayette's Premier Test Only Smog Check Station, we were created with a groundbreaking focus on creating a reputation for service, quality and reliability.

Diablo Smog was founded on building trust and upholding value through convenience, speed and quality service. Come and see for yourself. We have a newly remodeled, air conditioned waiting roomwith fresh coffee and refreshments for our clients.

When you bring your car to us, we'll treat you with respect, honesty and integrity!

​Our technicians are highly skilled and have years of experience. Most of all: they love cars and care about yours. Whether it’s our quick, quality, friendly service or the honesty and value we bring to every interaction, our customers love us.

Get to know our experienced technicians. They’ve got tools, skills, and a desire to help. Come see why no shop is as quick, qualified, or convenient as we are.


Maintaining your business 


For the many years we’ve been in business, we have been striving to provide our clients the best quality service possible to gain their full satisfaction. And they’ve shown their appreciation by coming back to us repeatedly.


We want to be the auto maintenance and repair facility for all your automotive needs.

​​​​lafayette's PREMIER STAR CERTIFIED SMOG SHOP           
3364 Mount Diablo Boulevard, Lafayette, CA

(925) 284-1988