10 out of 10 stars the crew aint playing all business when…read moreit comes to fixing cars got my front brake pads rotors done on my bmw treated with respectfully and foremost no up selling had me out there in under a hour. if you want a trusted mechanic this is the spot . thank you team you guys did and outstanding job will be back. 1-30-26.

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.

I have used Star Smog many times for my vehicles. Always quick and very convenient. Sophia always…read moregreets with a smile and very helpful!

My go to place to get quick and reliable service. Conveniently located near downtown and plenty of…read moreparking spots! If you need to get your car smogged, and don't want to waste time on it being done, this is the place to go.

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!

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 had expressed a window of time i would be by, and ended up being being a bit late…read more i didn't have to wait e 5 minutes, until my car was in the bay, and the entire process was done within 15 minutes from the time i arrived. Sam was so pleasant and helpful! i missplaced my phone and he called it and i had it back in hand immediately. he had offered a coupon and remembered that when he was checking me out. he we far and above what i have experienced at other places. I will definitely be back next time i need a star smog! 5*****

Elite craftsmanship, honest leadership, and true car people…read more This shop is the definition of how an automotive business should be run. Sami, the owner, brings a level of experience and integrity that's rare today. You can tell immediately he's not interested in shortcuts -- only in doing the job correctly, responsibly, and with long-term ownership in mind. That mindset flows through the entire operation. Amal is equally impressive. She's professional, knowledgeable, and incredibly organized, making communication smooth and transparent from start to finish. Together, they've built a shop that runs efficiently while still treating every car with genuine care and respect. They previously handled a major drivetrain project for me (BMW E38 M62TU swap), and the execution was flawless -- clean work, fair pricing, and no surprises. That level of trust is hard to earn. Because of that experience, I'm now confidently bringing them another special vehicle for a full recommissioning. I wouldn't do that if there were even the slightest doubt. If you're an enthusiast, collector, or simply someone who values honest work done right the first time, this is the shop you want. Sami and Amal run an operation that sets the standard. ( Sami also has a pristine Carrera 993 air cooled ) Highly recommended.

Hello out there. I had another great experience at Concord Smog, Tune and Brakes yesterday. I…read morehave been going to them for years now, back when Ray owned the business, then on to Sammy and now with Sammy's daughter, Amal. I take all of my family vehicles there for oil changes and transmission service, brake jobs and smog checks, which are the bread and butter for their shop. Quality work, very fair prices and wonderful customer service. I highly recommend them!! Let's keep them going! Paul R.

Great service and he was quick and efficient now I'm just typing eighty five charactersread more

Took my friend to get her car smogged a few days ago and it was finished within 45 mins. Quick…read moreservice and great customer service! Thank you!

Y'all know the drill. It's time for a smog. This place is awesome. Kind, quick and they have…read moresnacks! I've taken my RV and van here and I'm done and felt taken care of. They also can do your registration as well. I highly recommend this place if you need a smog. P.s: they also support other businesses which I love.

Smog Guys was recommended to me by a coworker and I am extremely happy I took his recommendation…read more Staff was very friendly and helpful. They took care of my smog check and vehicle registration super quickly and saved me a huge headache from having to deal with the DMV and explained every form and charge. I was literally in and out in about 30 minutes. I would highly recommend this place to anyone and everyone looking for this service. Worth every penny.

Ok... down to the wire, and it's time for the smog check. Went to my normal site... they couldn't…read morefit me in. A friend recommended this place, and I'm extremely grateful. I've used the gas station before, but never realized there was a smog station in the back .The entrance looks sketchy, so I was a little bit leery, but once back there. Mr. Loc helped me out. He was great!! The car had just come from the shop and they did a shoddy job. He showed me the problems, which affected the computer hook up. He made needed adjustments (definitely above and beyond) and walked me through the review. I appreciated his exceptional service. The value is normal price and overall, it will be my new location to get my smogs done. Thank you Loc I really appreciated your help, Sharine

The work is done fast, prices are fair, and the atmosphere is friendly. I highly recommend this…read morestar smog garage to anyone and for any vehicle.