Amazing service! Love this business for doing all our smogs to all of our cars, that we have even…read morereferred our neighbors to come here. The Tech is quick and the doing the smog and efficient Please keep this business IN BUSINESS by reading my post and bringing in your cars to get your smogs done here!!!! We bought our Acura RSX Type-S, my Honda S2000 and our Ford Expedition and brought our neighbors brought their Jeep Cherokee.

If this place is close to you, it's a great deal. Ask for the Yelp pricing. It was $30 less than…read moreother competitors. I only found out by doing one of those Yelp quote requests (from various competitors, did it sheerly by accident trying to make an appointment at a prior place I went to). It's a no frills place. No appointments. Walk-ins only. We were lucky in that the person before us was just finishing up when we arrived so we didn't have to wait too long. The waiting area is a few fold-up chairs in a square concrete area that is quite sloped.

Fast courteous service. I arrived before the shop opened and had 2 people ahead of me. I only…read morewaited about half an hour for my Smog.

I was hoping to have utilized services from this location "based" on reviews that I read. But upon…read moremy arrival, I did not notice much activity at the location. So I proceeded to walk up to the door to only find out that the doors were locked., I viewed the business hours on the door, which reflected open. I then reached out to their "text" line nicely asking about their hours and was informed shortly after (with no greeting) that their machine was down for the day. And expected to be back up and running the following afternoon. So I had to take my business elsewhere.

Response time was quick. The service was quick and easy…read more Got my car smogged and processed in about 15 minutes.

Great smog station for older cars, prior to 2000. Great customer service, super friendly staff…read more Fast in and out. Highly recommend.

This place is very honest they do quality work I would recommend to everybody let's book ahead…read morebecause they're very busy. It's not easy to find a good mechanic.

Extremely fast and friendly I will make this my smog spot from now on!!! Very good, thank youread more

Fast, friendly service. Good price. Comfortable and clean waiting area. Knowledgeable staff.read more

Great service and super knowledgeable! The owner/tech is very kind and helpful as well.read more

Called the same day and talked to the owner who was fantastic. I said I needed a smog check done on…read moremy car and he said I could come in the same day. I paid $65ish because they were running a promotion. I would definitely recommend them to anyone who needs theirs done. Thank you!

I needed a smog for my car and was able to schedule a same day appointment. The process was super…read moreeasy and by far the quickest I've ever gotten in and out of a smog. I will definitely come back here and recommend to others.

Super friendly and fast service!…read more I came by Smog King on a Friday morning. The two gentlemen came out and one said they would pull my car up to the stall. One of them walked me to the main office and waiting area. I paid for the smog service in less than 3 mins. I was asked to wait in the waiting area until the Smog was finished. The waiting area is very cute with all the decor and model cars. There is also a restroom available in the waiting area. The entire process took less than 20 minutes. Thank you SMOG King for the fast and wonderful service. I highly recommend Smog King for anyone in Fairfield or the surrounding area.

Great smog shop and they open on Sundays. The staff members were very friendly, I will definitely…read morebe coming back.

Excellent, fast, and friendly service! Called on a Tuesday around 12:40pm to book a same day…read moreappointment for a Smog check and was able to get one. I needed to get a Smog certification to get my car registration renewed, and Walnut Creek Smog made the process easy! Check in was quick, and the Smog check was completed in 15 minutes as promised. I've been here twice now, and I'll definitely be back in the future!

Easy, online appointments, efficient, friendly customer service, easy to find near Walnut Creek…read moreKaiser.