Im so glad I called this place! I needed a smog check and my regular place was down for a couple…read moreweeks. So I did a quick google search and gave this place a call. The advisor that answered the phone was so nice, and said come on down! No appointment needed. I must have driven by this place a million times in the past. They have a nice waiting room with plenty of seating, front door open for fresh air, both advisors working inside super nice and helpful. He took my keys and started on my truck right away, which I definitely wasn't expecting! He gave me a time frame before I even had to ask! I hung out and played games on my phone. Totally chill in here. . Anddddddd they have a $10 smog coupon on their website they let me use. Overall, awesome experience! I'll absolutely be back and recommend these gentlemen! Thanks guys!

This is a good place in the area if you need a certified smog test. The service was pretty quick…read more In my case, I was in and out in about 30 to 45 minutes. I went into the office to let them know what I needed, and I found a $10 off coupon for a certified smog test on their website (the coupon must be printed). I was really happy that they honored it. The cost was $79.75 for the vehicle inspection plus an additional $8.25 for the certification, which isn't optional since it has to be sent to the DMV. With the $10 discount, my total came out to just under $80. Honestly, though, that was on the higher end, but I guess it's still within the normal price range for the area. Overall, I was happy with how fast everything was. The only downside was that the man working at the front desk wasn't the friendliest. He wasn't rude or anything, but he definitely came across as someone who was just there to get the job done. The customer service could be a little better, but honestly, I don't usually have very high expectations for automotive service businesses when it comes to friendliness. As long as the work gets done efficiently, I'm generally satisfied.

Super Station is located along Monument Blvd, across the street from Del Valle Super Mercado…read more I came in as a walk‑in to get my gas car smogged on 07/17/2026 at around 10:45am. One of the attendants got me started on the paperwork almost immediately. By 10:55am, my car was already being inspected, and by 11:05am, everything was done. The total, including the state paperwork, was $58--about $15 less than what I paid for my last smog check at another shop. I was really happy with the quick turnaround and the price. Highly recommended! BONUS MATERIAL: - They are a STAR certified station. Smog check was $49.75 (with coupon found on their website) + $8.25 for the CA paperwork.

Walt from Walt's Adventures in Concord, California. State approved vehicles allow me to travel…read morefrom one adventure to the next. Smog checks are necessary for California. Super Station on Monument was professional, quick, and I would recommend them.

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!

This is a hidden gem! I tried to get a smog done at another local shop and when they couldn't take…read moremy car for the second time I jumped on Yelp to find someone who could get my car. My first call was to Walnut Creek Smog and they told me they needed to calibrate the machine and to come in an hour. I showed up and was greeted and they quickly got to work. They smogged my car quickly and were priced fairly. The employee who helped me was super friendly. They just won us over as new customers!

Quick and easy, walked in for a smog and was done in under 30 minutes. Friendly employees,…read morerecommend for any auto needs

Had to get a smog check, forgot until the last minute. Used the Yelp app for services to check…read morelocations and pricing. Star got back to me fast with the price and I had a reservation for the same day. Drove down three hours later, and it took longer to park and do the paperwork than it did for me to wait for the smog check and Star certification. Amazing help, fast, nice receptionist and tech. Cheap af and great work!

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!

My Initial review has been changed because of Ken! I clld in expecting to get the same rude guy…read morethat's been there for years but was pleasantly surprised! Ken has great customer service and was just super cool! I told him I'd be in after work around 5pm. I pulled up, nobody there but me, but then again it's almost 100 degrees outside right now. I'm glad I gave them another shot. My review score went from a 1 to 5!! I appreciate you Ken and good looking out on the discount.

I had a fantastic experience bringing my Audi to Irfan and the team at Clayton Auto Service. I was…read moreworried about passing my smog inspection because of a check engine light, and Irfan took the time to thoroughly explain the issue and gave me honest, straightforward recommendations on the best way to fix it. I never felt pressured into unnecessary repairs. Their pricing was significantly better than the dealership, the quality of the work was excellent, and they had my car repaired with a quick turnaround. It's refreshing to find an auto shop that's knowledgeable, trustworthy, and truly puts the customer first. Clayton Auto Service has earned my business, and I'll definitely be returning for future maintenance, tune-ups, and any repairs my car needs. I highly recommend Irfan and his team to anyone looking for honest, reliable, and fairly priced automotive service.

Clayton auto services has been extremely helpful. I have taken my cars to them multiple times; they…read moreare quick, do high quality work, and are very reasonably priced! If you want quality work at a great value, go to Clayton auto service!

Efficient, friendly tech and cost effective. Didn't even realize they were so close to home. I'll…read morebe back!

Great, quick service! The person working was really nice and made the whole process easy. I was in…read moreand out in no time. Definitely recommend supporting this local Pleasant Hill business!

Great service, smogged my vehicle, answered the phone, was very easy to schedule, fast service,…read moregreat price!

I can't say enough good things about Sami & his mechanics. I'm always nervous going into shops as a…read morewoman, but Sami treated me like I was his own daughter. I brought my car in for a screeching sound in my front brakes & they took me in immediately, fixed the issue & made sure my car was safe before they put me back on the road. Unbeatable service! I am forever grateful & will remain a loyal, returning customer. Thank you, Sami & team! Bless you all!