Quick, courteous, spot on service! Highly recommend this place for your smog check. Great service! read more

This is a family run biz, open 7 days a week. I was able to come in on Sunday morning and get my smog done. They have coffee, water, popcorn, PacMan, dog treats! This is my go to smog shop. Thank you guys! read more

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I needed a smog check on a Saturday and found this business on Apple Maps since they were open. Maddie was professional, explained everything clearly, and worked efficiently. The process was quick and hassle-free, and I appreciated how organized everything was. I was especially impressed with how smoothly she handled everything on her own. Overall, a great experience--I'd definitely come back and recommend this place to others. read more

Open on Sundays! What a huge help. Comfy waiting room with snacks, coffee and a TV just out of the photo. Got right in. Super nice guy. My dad gets confused and I didn't need to worry here. I knew he'd be treated with respect. Brought my dad's 20 year old truck in to be smogged. Was worried if it would pass, but it's well kept and passed just fine. Price was competitive as my hubs said he paid more in Sacramento when he got his car smogged. read more

J & S Smog - Open on Sundays! What a huge help. Comfy waiting room with snacks, coffee and a TV just out of the photo. - Smog Check Stations Near Me - Grass Valley, California

These guys were great! They were friendly to me and my dog, got me in and out quickly, and I got the smog test that I needed. They even gave me some good advice about the car, and I was very thankful! read more

He was very nice I would just warn people that if you have any work done make sure your car is smog ready. It's a simple test and free so I don't know why all places don't offer it automatically. read more

Quick and attentive service with a kind smile. They fixed all my issues and didn't absolutely break the bank! Will definitely be going back.

Fast, friendly service. Convenient location and hours. Clean, comfortable waiting room. They even have doggie treats! This is my new go-to for smog tests. First time customer, but I'll definitely be back. Highly recommend. read more

In my 40+ years of living in Nevada County I have been to just about every smog service there has been, but these guys are the best. Quick, efficient and friendly. Plus the best rates in town. I highly recommend. read more

Fast, honest and very nice to deal with. These guys are great! No excuses, no BS. In and out and happy to have us. Thanks for being the best! read more

Fast service! Friendly folks! So thankful to have found them! And not to mention they had free popcorn, really appreciate as it was lunchtime and I was starving! Thank you J and S Smog! 5 stars! read more

Owner is mechanic/receptionist on Saturday. No frills, good prices. Fast, considering there were 3 cars in front of me. Perfect for smog check. I recommend read more

The guys were friendly, fast and reasonably priced. The waiting area was comfortable and appreciated .

Went here today for the first time. I really enjoyed the fast and friendly service. They have a nice big area where you can wait while they smog the car. The guy was friendly and quick with getting everything done. He mentioned I could have some of the popcorn they had. I also saw a cooler with some drinks that I assume are for customers. I did not have to stay too long at all. I was in and out pretty quick, maybe 20 minutes and that was with him doing a smog when I parked. I will be coming here from now on for my smogs! read more

I didn't need an appointment and they could accommodate my oversized van! Comfortable and accommodating, great service as well and fees are very reasonable. read more

Getting your car smogged is not a lot of fun. But this shop did it fast and the price was right. They are super responsive on yelp and when I arrived I was able to get in and out of the shop real quick. I love the fact that there were no surprises and this is on a 2004 Honda CRV so you're always expecting a surprise so thank you for that. Keep doing a great job and anyone who reads this should go to this shop. read more

I called in for same day service and they were able to get me in right away! There is a cute little lounge area and my kiddo and I were excited for popcorn. Thanks for making the smog process quick and easy! read more

Have been not wanting to get my smog done because it is always such a hassle. I wish I knew places like J&S smog existed. Drove up and was able to get in right away with an appointment. They have fresh popcorn and drinks as you wait. Was in and out within 10 mins. Had to bring my 6 year old and she was so happy with getting popcorn that we will be customers for life! Thank you for the quick and great service. Literally the easiest smog I have ever gotten! read more

5.0 star rating 12/3/2023 I contacted J & S Smog through Yelp and requested a quote. They returned my query in less than 10 minutes and said there was availability. I asked if 30 minutes would be good and they responded immediately with a Yes! Friendly, fun, kind, and professional all at the same time. :-)) The waiting area is filled with fun Harley memorabilia, and fresh hot popcorn right from the theater popper was waiting! These guys were great! I highly recommend their services! I rarely do reviews, but these guys definitely deserved every word I've written! Thanks guys! **** PS: These guys are so good that when I received an email from Yelp to review them, I did it again read more

Great service at an very affordable price for my car to be smog's owner very professional. I will use J&S smog on all of my vehicles in the future read more

I can't believe more people haven't taken the time to review J&S Smog! I went there today and had a wonderful experience. As others have mentioned, the lobby is clean and spacious and YES, they do have delicious, fresh popcorn, even in the morning! They also offer free water, soft drinks and coffee to their clients, I think I was there less than 15 minutes and all 3 gentlemen I encountered were just super friendly and seemed like they all love what they do. It really started my whole day out great - and Yes, even though it was "just a smog test"! read more

This shop is awesome! Called to get a last minute smog totally forgot my husbands vehicle needed it for registration! I called before sending my husband and the owner was so nice I was really impressed! He said come on down let me know he was open until 7. We got the smog done and it was quick and easy! I was so happy that we were able to get the truck in before the registration was due the next day it's great to know there is businesses that are willing to help in a time crunch! The price was also super reasonable! Overall the service was outstanding and we will be back next time! Thanks again! read more

Quick and easy- the person who helped me was very professional. This only took a few minutes of my day.

These guys are awesome! They walked me through a hard reset on a car that needed to be smogged but wouldn't because the battery died and needed to go through a specific drive cycle before allowing it to pass. You gained a lifetime customer! read more

Service was quick and easy! Josh did my inspection and he was really friendly and helpful. Their waiting room was clean and nice. Overall, the best smog place in town! read more

Excellent customer service. No wait and out the door in 15 mins. Can't thank J &S enough!

This is my new go to spot for a smog check. They have a very comfortable waiting area, friendly staff, and fair prices. They're hours a great too! read more

DO NOT GO HERE. These people are not trustworthy. Go to Karl's smog instead. The owner wanted to buy my Toyota Highlander for his daughter and wouldn't pass my smog even though I had passed it through the same shop less than three months before for my registration renewal. Guy tried to convince me I had a failing catalytic converter even though I had a brand new one installed less than 4 years ago. Offered me some lowball price for my car, told me it would only sell for parts and insisted I "shouldn't sink more money into it by taking it into a shop." Ended up taking it to a mechanic, the mechanic noticed that mysteriously one of the air intake valve lines had been snipped and that it wouldn't be able to pass smog emissions test until it was reattached. He reattached it, I took it to Karl's and it passed the same day. Run don't walk away from here and if you do go here, don't sit in the waiting room. WATCH EVERYTHING THEY DO TO YOUR VEHICLE. They literally cut one of my air intake valve lines so that it wouldn't pass smog and I would be forced to sell them my car for a much lower price than it was worth. Karl's smog is just down the street and 1000x more trustworthy read more

Extremely efficient, affordable and available! I work Monday-Friday business hours and weekends are often too busy to squeeze in anything else, J & S Smog was open after 5pm when all the other options have closed their doors. I was in and out after a quick 15-20 minutes and the price was not only very affordable, but also a nice even number. Keep up the good work gentlemen. read more

Very nice people, timely service, fair prices. Seriously ... what else could you ask for?

These guys were great! They were able to take smog walk ins and had me out within 15 minutes. Plus they have coffee and popcorn!

Highly recommend. Great service. In and out in 15 minutes with smog certificate in hand. Fair price. Comfortable waiting room with coffee. Friendly. Clean. Locally Owned and operated. read more

Car or truck need smog certificate? This is the place to go. Just left with certificate in hand in about ten minutes!! No waiting, an absolute fantastic test. Very clean waiting room, super friendly staff, and no appointment necessary. I have utilized this shop twice and both times service was outstanding!! Highly recommend this shop!! read more

Fast, efficient and friendly staff. No apt needed on a Monday, I was in and out. They do have weekend apts available though. Like others mentioned clean waiting area with popcorn and beverages read more

I called late on a Friday afternoon to check for availability. "Come on in" was the reply. Just great service. And the waiting area is Harley Davidson awesome. Thoughtful fresh popcorn and comfortable seating. Neat as a pin with lots to look at. Made waiting a breeze. They are the only Smog service in the area open on weekends too. Thanks to all there! read more

Got my smog test today and they were fast, friendly and cheaper than the surrounding options. They have a nice comfortable waiting room as well. read more

Super affordable! Extremely fast! And great coffee! Will definitely be returning in the future.

Best smog shop in Nevada County. Super friendly owner, excellent service, and great pricing. The waiting room is very clean and has free popcorn! Highly recommended, this is the place to get smogged! read more

I popped into J&S this morning and was immediately moved into the bay. Twenty minutes later I was done. These guys are quick! You have the option of waiting in a nice air conditioned waiting room. They had fresh popcorn at 8:00 am in the morning and coffee as well. But I chose to hang out in the garage where they have a comfortable leather couch and and a wide variety of motorcycles to look at. All in all a great experience! read more

We were traveling in to Grass Valley, bringing a car to a family member and needed to smog it for transfer. J&S answered phone promptly - made an appointment time for us and were ready for us to pull right in when we arrived. Smog check was done in 15 minutes while we waited. Awesome service and really nice gentlemen working there. Highly recommended! read more