5 stars all the way!!! Called last minute asked if they had time for a smog. I was told to show up and they'd try to fit me in. I was there 35 min tops. Great job! read more

My first time there,and I am so happy with service,it was fast and waiting area is so clean and fresh,love these place now and I'll coming back and Recomend it 100% it is A plus read more

Quick and professional! I used a groupon and couldn't be happier with them. read more

Absolutely wonderful service ! We had two cars whose windshields needed to be replaced. The fellows arrived in a timely fashion and were completely professional and thorough ! I could not be happier and I look forward to having them provide their services to us in the future. Whenever we need a smog check or glass replaced, we're going with MM ! Thank you so much !!! read more

Great Deal! I checked 3 other places and M Smog had best price. Got there after 1:30 and out within 30 minutes. I highly recommend as very Professional plus nice waiting room. They accept credit cards but next vehicle I take in for Smog check will pay cash to save his credit card fee. Located right across street from Lexus in Concord. read more

read the reviews and thought this might be a good place to do a last minute star smog for my DMV renewal. It turned out to be an excellent choice. I called to make an appointment, even though I didn't need one. I was greeted right away and said that it would be 15 minutes. It may have been less than 15 minutes, another plus. My car passed the smog inspection and the info was entered online directly to the DMV. I was also given a copy, along with a nice cold bottled water. Yes, I will definitely return. read more

Saw the reviews and had to give MN Star Smog a chance. Met Melvin. Great guy and got me in within 15 minutes. Passed smog 15 minutes later and was on my way. Very professional and great group of guys. They have my future business. read more

Very pleased with the service, in and out pretty fast. Waiting area clean and comfortable, will recommend and use this service station again. Thank you Melvin, read more

If you need a smog check -- this is the place to go! They care about their customers!!! I called about a smog check. I explained that my check engine light was on sometimes but kept self-correcting. It was likely the oxygen sensor or a new filter but it wasn't really broken so I was reluctant to take my car to the shop before the smog check. Sara said they didn't charge more to retest and she was so helpful I headed over since the check engine light was off at the time. Melvin who tested my car noticed the vacuum hose was loose and reconnected it (probably explains my check engine). Thanks to them, I avoided an unnecessary and likely expensive diagnostic just to pass my smog test and get my registration paid on time. The office and wait room were very clean and everything was new. There was the self serve coffee/tea. The tv was on the history channel but a remote was available and I think there was also wi-fi. But I wasn't there very long - they were quick. And yes, the pricing is very competitive! Thank you!!! read more

Went late in the day without an appointment and a Groupon coupon for a smog check. I was in and out in about 25 minutes. Clean waiting area, quick, friendly service, great price, couldn't ask for anything more. They'll get more of my business in the future. read more

This was the best experience I have ever had with a Test Smog. No games. Price exactly as quoted. Arrived early for appointment., Got me right in and completed test in good time. They were very professional, treated me with respect. even got me a band-air for my sore. Nice clean facility. I'll go back next time. Nick read more

Melvin is a great guy to work with, the shop is extra clean and the lounge seats were so comfortable they almost made me fall asleep for the 15 minutes i was there. read more

Professional, fast service and very clean facility. They are located right across the street from the Lexus dealership in Concord. Melvin was very professional and accommodating even asking if I wanted a soda or water while I was waiting. I was in and out in 15 minutes. I walked in on a Monday morning around 11:20, but they do take appointments. I highly recommend!! read more

I got my civic smogged here today and was pleasantly surprised. The price was fair (about $60) they got it done in about 20 min and the waiting area was clean and comfortable. You can't really ask for much more from a smog shop. This is a Star smog location for those that are required by DMV. read more

Trying to be proactive with adulting this year, so as soon as my registration notice came in, I started shopping around for a place to get a smog check. Found MM Star Smog on Groupon, and liked that it was close to my house. I called and made an appointment for Saturday morning. The gentleman I spoke with over the phone was polite and helpful. The day of my appointment, I needed to push my time back. They were willing to accommodate the change. When I brought my car in, they told me it would take about 20 minutes. I was then shown to their waiting room - very clean. 20 minutes later, my car had passed, I was given a copy of the certification, and was told if I came back, they'd honor the Groupon price. read more

Had to have a car smogged to sell. Found a groupon for MM Smog for 39.00 & they took me right away. They were very busy with other vehicles but called me when the car was ready. Excellent place, price & professionalism. I'd come back here in a heartbeat.(with a Groupon!) read more

Awesome! Took me in right away, super friendly, finished quickly. They also have the nicest and cleanest bathroom I've ever seen! Highly recommend this place! read more

Purchased a Groupon and was extremely pleased and delighted with the service. Not only did they create a space for waiting that felt similar to the BMW and Lexus service centers, I could tell that the owners and service personnel were truly interested in doing the best job they could. My appointment had me in and out within 20 min. Terrific place for getting your car smog. read more

Super fast, super cheap! They charged $20 less than the average for a smog and promised a free retest if it didnt pass. I walked right in and Melvin started checking my car-- he was super nice! They have a nice air conditioned sitting area, too. I was only there 20 minutes tops. I highly recommend this place. read more

Great service. In and out in less than 15mins. Will be back next time i need a smog.

I bought an Amazon Local deal for a smog check. Wasn't expecting such a clean facility with a lounge, complimentary beverage, and fast service. Melvin was super cool and didn't try to sell me some extra mumbo-jumbo which it seems a lot of shops try and do these days. Simple deal with no surprises. Will definitely be recommending this business and coming back for more. read more

Awesome, incredible, amazing!!! These are just a few words that describe MM Star Smog. After several attempts to smog our vehicle through another company, which failed a few times, my brother finally said you have to try the company that does all my vehicles. They have been doing it for years and I've always been pleased with the service and the people. Upon arriving at MM Star we were pleasantly greeted by Melvin. We explained that we had the evaporation leak fixed, which was the original issue, however the system was not resetting itself in order to pass smog. We were told to run\drive the vehicle at full strength; turn the lights on, the defogger, the air-conditioner, and the music. We were told that sometimes older vehicles need this type of process to reset after being fixed. I just wished someone had informed us of this tip months ago. Melvin took our vehicle in, I said a silent prayer, and with a smile Melvin returned less than 20 minutes later with great news that our vehicle passed the smog test. Thank you, MM Star!!! We will definitely use you in the future and refer others to your establishment. read more

I stopped in late afternoon on a rainy Monday to see if they could take my car for a check and everything was wonderful! Melvin was great, friendly, helpful. I didn't have the reg. renewal notice with me, but he found it using my car's VIN. It didn't take very long (not enough time to fully appreciate the comfortable seats in the waiting area!) and, SURPRISE!, when I got in my car to leave after paying I noticed that they'd also cleaned the dashboard while they were at it... a mini 'detailing'! Amazing. Will definitely use them again! read more

Been going here for a few years now. Clean and nice customer service! I never have a problem here and don't mind waiting because they have a nice waiting room with a tv! read more

This place is great. I will never take my cars anyplace else. The front desk guy is too cool. The service is fast. Great price great service you can't go wrong. Thanks guys read more

Excellent customer service!!! I found this place has a deal on Groupon so I called to make sure they were able to complete the smog today as I needed it done right away. The man on the phone said yes he could take me today and no need to purchase the groupon as he would just honor the price. Fantastic! I came right over and there was no wait. The gentleman was very friendly and polite. The waiting room is extremely clean and it very nicely updated with a nice big screen tv to keep my entertained while I wait. I will be back in the future and I highly recommend this place. read more

I needed to have the smog done as I am selling my car, and found them on Groupon. Gave them a call to see if they are available and O'Neill told me to drop by right away and I was in and out within 30 minutes. The shop is very clean, and O'Neill is very knowledgeable and friendly. I will definitely to visit them again if I need to have my other cars smog or windshield replacement. Give them a try and you will not disappointed. read more

Absolute The best smog experience I ever had! And I ve been around since Captain Kangaroo. I really like Melvin, the friendly professional young man in reception area. 1. Every vehicle is 50$. Yes! Older cars to rv's! No searching all over for a good deal. No wondering if the guy sitting next to me got a lower price. 2. Customer service was excellent! Just like the old days. Any woman would feel comfortable here. 3. Clean! And well cared for plants and nice separate waiting area I wouldn't have been surprised they offered me a beverage and snack. Well they did have water and candy. Peppermint puffs, one of my favorites. Even Monk would approve. read more

The best place for a smog check! The staff are very friendly and professional, the store is very clean and modern, with a very comfortable waiting area. The best part is that the whole inspection only took 10 minutes! Definitely not going anywhere else for a smog check next time! read more

I used a Groupon for a smog here and had never been here before today. I will always come back to this place now! Excellent customer service! Their internet was down so I was expecting to wait for quite some time, but the manager was working extremely hard to get it back up and running and kept reassuring me that I wouldn't have to wait much longer. I ended up only having to wait about 20 minutes before my car was done and had a nice chat with the manager before heading out. Great service all around, 10/10 would recommend this place! read more

These folks are the best! The customer service is excellent, I went for a walk while my car was getting a smog test and ended up in a downpour. They offered me a towel to dry off and were very good natured, despite the fact that I was surely getting their floor all wet. Very female friendly and a great value. read more

Super fast smog check. The workers were so nice, very polite and made sure to get the smog check done during my short lunch break (and with time to spare). It was also the cleanest and nicest waiting room I've ever seen for an auto shop. Reasonable price too. I would recommend this place to anyone and plan on coming back for all smog checks myself. read more

Friendly staff and fast service, was in and out in about 15 minutes on a Saturday.

Bought a deal on Groupon, they take appointments, so no waiting. Good service, nice people.

TERRIBLE CUSTOMER SERVICE. While checking out, the worker took the opportunity to harass me about my apparent lack of religiousness and told me I was following a wrong path in my life for not attending his church... yes. That just happened after getting my smog test out of all things. Zero respect or shred of shame. read more

This place is awesome!! Melvin helped me and he was super friendly and helpful. This is one of the cleanest Auto places I have been to in a long time. The waiting room is sparkling clean. I will recommend this place to all my family and friends read more

Finally found a great SMOG service - these guys quoted me a great out-the-door price over the phone...no added fees when I came to pay. They were not busy so I got done in 20 mins...Awesome! read more

My husband had his windshield replaced and they did a great job. In and out and done right. Then I took my car in for a smog check and not only were they fast and efficient, the reception and waiting room were nice. Usually you go to a place like that and it's gross and smells greasy, but not this place. I only waited about 20 minutes and it was pleasurable! I will definitely go there again! read more

I took my car there today for its first smog check. I was in and out in under 30 minutes - with a passing certificate. It was so easy! The receptionist and the technician were very friendly. I will go there again in a heartbeat. Thanks MM Smog! read more

Great place always polite and fast work done right, can't beat the prices. Staff always give great solutions