Diablo Smog is family-owned and operated with focus on customer service and giving back to the community.

We are a premier Star Certified and licensed Smog Test Only Station servicing Lafayette - Walnut Creek - Orinda - Moraga - Pleasant Hill.

We accept competitor's coupons and offer discounts to:

  • Seniors
  • Retired Military
  • Active Military
  • Fire Fighters
  • Police Officers
  • Emergency Responders

Quality  & Service Guaranteed

At Diablo Smog we can test the following:

  • All Passenger Cars
  • Minivans
  • Trucks
  • Luxury Vehicles
  • Classic / Vintage Vehicles
  • Diesel Vehicles
  • Hybrid Vehicles

We test vehicles directed to:

  • Test-Only smog shops
  • Annual Smog Checks and Renewal Notices
  • Change of ownership
  • Out-of-State Vehicles

Smog Emission Test Certificate is automatically transmitted to DMV.

FREE RETEST Worried that your vehicle might not pass your smog inspection?

No, need to worry! 

If your vehicle fails it's smog test, we will provide a free retest within 60 days.

(The original smog test must have been conducted at our shop and the $8.25 certificate fee is due upon completion.)



Call us today to schedule an appointment (925) 284-1988

Walk-ins Welcome


Lafayette's Premier Star Certified, Smog Test Only Station