+1.(925) 284-1988

3364 Mount Diablo Boulevard, Lafayette, CA, United States


We are STAR certified and licensed to perform a smog check on any vehicle. The STAR program was designed by the state to identify the vehicles that are most likely to have high emissions. These vehicles are directed to STAR stations which are continuously monitored by the state to insure that both the station and the technicians are the most qualified to perform smog checks.

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We are closed on the following Holidays:

New Years Day
4th of July
Thanksgiving Day
Christmas Day

Close early on:

Memorial Day - 3 pm
Labor Day - 3 pm
Halloween - 3 pm
Christmas Eve - 3 pm
New Years Eve - 3 pm

What will you do till the time your car is being tested?

Go through some latest editions of some popular magazines, grab a soda from the fridge or help yourself with a hot coffee. You can also use the free WiFi.


Worried that your car might not pass? If your car fails its smog test we will provide one free retest within 30 days.

* The RETEST will be free only if the smog test was done on the shop-listed prices. However, the Certification fee of $8.25 will be charged even with the free retest.

​* The Free RETEST is not valid if the initial smog check was done using discounted offers.

Diablo  AmeriSmog


Monday - Saturday : 09:00 AM - 05:30 PM

STAR Certified

SMOG Station