D1 was great. They were ready for me when I walked in at my appointment time, the work was completed quickly, and my smog certificate was sent directly to the DMV. This is the service I came for and I was happy when I left. I received a discount based on status as a "senior", which I always like. A good value and experience. read more

Quick and easy. Got an appointment the next day, and all was done in about 20 minutes.

Great place to Smog. Fast, reliable and honest. I've brought my car for two smog inspections. Always a good experience. read more

Got my wife's car smogged at D1 last Friday, excellent service, in and out in less than 30 minutes. Scheduling was easy. I highly recommend them read more

Great family run smog shop. We took both our cars in as we had to take them to STAR smog locations. Very friendly and fast service. Everyone there was efficient yet attentive. They are near Lola's Market on Seb Ave read more

Easy online booking, super fast no friendly efficient smog service. WiFi in the office while you wait. Makes the whole process painless!

Fast, easy and simple. Good price and local too. What's not to like. Only downside is they are check or cash only, and that's not that big of a deal. read more

I've been going to D1 for several years now. David is always efficient, and more importantly completely honest. Last week I took in an old truck I don't drive very often. I had replaced the battery several weeks ago, but hadn't driven it since. Apparently it takes more than a half-hour of driving at freeways speeds to reset the computer sensors. David asked me if I had recently changed the battery because the sensors weren't all reset. He stopped the test, told me to go drive it some more and didn't charge me. I brought it back in a few days, and it passed no problem. I highly recommend this place! read more

Great company to work with. Easy to book an appointment on line and very reasonable prices. And close to home.

Great service! Great location-close to town but not too crowded, We'll be back for more next year!

They were super responsive to all my questions over the weekend and completed the job for the quoted price. Friendly and easy to work with.

D1 Smog check is the place to go if you need a smog service done on your vehicle. David is super helpful and so amazing! Support your local smog check shop, you won't regret it! read more

Such great folks - they are friendly, helpful and considerate. this is now my go-place for smog checks!

They are very friendly and I was able to get the smog very quickly. And I appreciate the outdoor waiting area! Thank you! read more

Would definitely come back for smog service. Great location great price great customer service! Very friendly. Not to mention so close to the Santa Rosa Laguna trail. Was a beautiful walk whilst I waited! read more

Great folks at D1. I try to support local business and if you feel the same and live in the Sebastopol/west county, this is an excellent choice. You can make an appointment online. I was in and out in half an hour! read more

I had to get a smog and was running out of time. David fit me into a busy schedule and helped me tremendously. Also the price was fair and affordable! He is also a STAR certified station which is what I needed! I will be going back for all of my smog checks. Thank you D-1 Smog. read more

Took my truck here for smog testing. It didn't pass. Ok. Paid the fee and took it to a place that does smog testing AND repair. It passed. W/O anything having to be done to it. I called D1 and asked for a refund b/c it passed at another place w/o anything having to be done to it. They refused. I would recommend going somewhere else... not at all satisfied with this place. Very disappointing. read more

D1 Smog Check is the place to go! Roberto was extremely professional, polite and efficient. It was easy to make an appointment online and when we didn't pass on the first go round a repeat appointment was readily available once we made our repairs. read more

They took way too long to find out it didn't pass by .19 of a point to make it fail. This is so they can charge you another $45 for retest where elsewhere it's normally no charge , except for the certificate. Going to complain to the state whoever is in charge B.A.R ( bureau of automotive repair) I think it is . read more

Love this shop. I got in first thing and he had my Acura MDX 2004 done in 20 minutes. Great service!

David is very friendly, no-nonsense, and most importantly fast! Highly recommend. Location is a little confusing; they are in the same building as Pauline's Automotive. read more

I brought my vehicle in for a smog check and was charged $77 to be told they can't submit the test because the check engine light was on. They could have told me that at the beginning. No consideration whatsoever and I have to pay full price AGAIN to bring it back, which I won't be doing. read more

Absolutely smog your car here,!!!! Women owned and staffed. No bs. Super nice and efficient. Advance equity while taking care of your car all in one shot. read more

Today was my first visit to D1Smog Check. I was very satisfied with all aspects of my visit. The owner was punctual, courteous, and very thorough in providing all that I needed for my records. I will definitely be a return customer! read more

First time using D1 for my smog, but won't be my last! Great experience. Super easy to book appointment online if that's your thing. In and out in 20 mins max. They made me comfortable while I waited. Brought my truck out to me, being sure to wipe all surfaces down before I hoped in. Very reasonable and transparent pricing. What I was initially quoted was exactly what I paid no hidden fees. Will definitely be scheduling my next smog here. read more

Just got back from getting my mom's prius smogged and I had such a good experience I was inspired to write a review. ~Making an appointment was easy. ~Technician was waiting for me when I arrived so there was no waiting. ~Car was done in about 15 mins! ~Office was set up with Covid precautions so I felt safe -- they wore masks, had clean pens, had me wait outside (which he apologized for but it was what I expected and was happy to do so!) ~They were polite and friendly. Thank you for the excellent service!I will be coming back with my other car when the time comes. read more

David is a wonderful person and its nice to see him succeeding at this smog facility. Perk: there a fleet discounts and he will go above and beyond to suite your smog needs. Yay D1 read more

My appointment was right on time - the staff was friendly, professional and gave me a complimentary mask and some hand sanitizer! They were just so kind and helpful. I highly recommend this smog check place, there's even a nice outside bench to wait... read more

Quick, affordable smog check and friendly personnel. Everyone was wearing a mask, they have touchless payment options, and they even disinfected my car after the smog was complete. read more

That was the easiest smog check ever! Online appt and a 25 minute wait. They placed a chair in the shade for me and were all smiles. As I was leaving, the technician was scrubbing down any surfaces that she touched. Super pleased by their service! read more

Last min booked an appointment and was 8min late. I hate being that customer but they didn't mind! Still took me in with a smile. Smog check was quick and easy. read more

They made a same day appointment for me when I called, wore masks for Covid-19 safety, used plastic over the car seat and wiped everything down on the interior driver's side after the test. Congenial and efficient staff. I will definitely use them again. read more