Great service and quick! Staff was patient and polite with…read morethis 80 year young customer. A bit pricier than other shops, but well worth the expense.

I needed my suv star smogged which is a specific smog place and I called around and got the best…read moredeal from this place. It's $53 dollars with a credit card and only $48 with exact cash required! So I figured I'm in for the $48 but there was a problem with my suv because it needed an O2 sensor so I then took it to my mechanic and his name is Tim Lynch with T&K Automotive Repairs he does it in half a day and I go back to RJ at 101 Expressway Smog and the thing is you have to drive a certain number of miles to get the whole thing reset. RJ tells me this so I went out and drove it around for a couple of days take it back to RJ and he charges me next to nothing to have it done the 3rd. Time!! How great at that!! Thank you RJ for being a good man! It's so appreciated!!

Speedy service at a very good cost. Clean facility and waiting room. I will definitely be coming…read moreback

Worst service in 7 years. Don't know what happen. But refused to give me owners number and short…read moreMexican and wanna be Fabio and their mother in front desk. Refused to look at my car because my car had factory oem Shield covering the headers. They went inspected more thoroughly than any other car I saw come in. Clearly they don't bmw m3s...

Quick and easy! I've been going here for 10 years and even with the new ownership it's still the…read moresame great experience. Friendly staff, and I'm always in and out in no time. They also offer coupons to returning customers (sent by mail only) which is also helpful.

Failed here went down the street and passed make that make sense . I called left a message…read moreregarding how much it would be for a retest and never received a response. The price isn't what they advertised due to new owners. They do not accept coupon that they have on their website. All that combined leads me to never come here again .

Fantastic place: great people, quick service, pleasant waiting room. I wasn't sure if our RV had…read moreenough miles on the road after some recent repairs to be able to do a smog check, and was delighted to learn that they offer a free scan check to see if the computer's stored enough codes for the check to be possible (it did). You won't go wrong going to them.

Hours say 9-4, but no one's there at 9:15. A few others came by to get smogs and I waited 15…read moreminutes.

I used Chris and his staff for more than a decade to service my various vehicles. I have everything…read morefrom high-performance cars, custom trucks, to basic work trucks designed to carry a heavy load and deliver equipment. They can handle any job, any time. They do great work and really try hard. Occasionally there might be a problem, but we always find a way to work it out. Chris and his staff are great to work with. Give them a try. I think you'll like them.

Single women stay away!! last year in march, I had a new…read morebattery put in at Sonoma county auto, and less than a year later I find out they put in the wrong battery, didn't register it (part of regular service when putting in a new battery), wasn't powerful enough for my engine and created more problems. In June, I had a cooling hose replaced and front breaks there also, but they didn't install the hose clamps properly and caused fluid to continue to spray all over my engine and under neath my car, by july ( a few weeks later) something was dragging under my car and I went in (kinda freaked out, seemed dangerous) but LouLou said they were at lunch and to come back in an hour- (a few people sitting in the office eating) .... so I came back in two hours BUT it looked like tHE mechanic and the Lady were leaving and the lady told me to come back the next MONDAY, very dismissive , but then the man got out of his car and ripped the hanging part out from my car and said it should be fine, .... I was stunned. It was 3:30 on Friday afternoon- and front desk girl wanted to go home- dismissed me again. NOW 2026, I got a new mechanic, of course..and the new mechanic said there are several issues including the battery and under my car there is a small hole in a hose which caused a slow oileak and splashed OIL under my car because there was no cover.... Leaving it exposed to road debris. My car is older but I have taken it in anytime I had the slightest issues. But now $5k later it's in worse shape than ever and would be thousand of dollars to clean and repair all these issues. My car is the shop again, Again because my battery- so Today- I called Sonoma auto to check the warranty on the battery they installed and got nothing but rude helpless answers from the front desk person. . Sh treats me like I annoyed her. Except, I'm a paying customer. Not there to make friends with LouLou. She's rude or she's just covering for the faulty services I received. Or both- sometimes, just taking reasonability for action is all a person needs to hear. But being meet with more dismissive behavior will only add fuel to the fire. Take responsibility, be accountable and treat customers like customers.

Ive been a client of this place for more than ten Years. And I can say this is the best smog shop…read morein Santa Rosa. Honest and professional service. Always recommend to friends and family.

Great place to go! Super fast with no appointment (took approx 10 min from the minute I drove in…read moretill I drove out!), great price and wonderful service! I will return when I need another smog and I highly recommend! So glad I was referred by a friend to go here!

Very easy to make an appointment. Very clean inside and a beautiful little patio to go eat outside…read morewhile you wait for your car. A place to play video games inside if you needed to entertain your kid. Fast and efficient. It was a great experience.

Their website and online appointment was super easy to navigate and book. The staff is friendly and…read morethe shop was extremely clean with free coffee and light snacks. They have a dedicated space for young kids/teens to games. I would definitely return for auto repair.

Absolute best. Everyone recommends this place and now I know why. If you have a nice car that you…read morereally like it will be in good hands while getting smogged here. A+

Been going here for years. Friendly, efficient and honest…read more You won't regret visiting this business.

I found this spot online and I am so glad I did! I didn't make an appointment and just dropped in…read moreand the girl in the front was really nice and quick getting my paperwork good to go for my smog check. She told me where to park and then I went to the waiting room and I really liked the waiting room. There were a lot of seats and there was a huge fish tank and little games I brought a book so I was OK, but it was just a very peaceful place to sit and my smog took maybe 30 minutes. I felt like I was in and out and it was just really efficient and affordable.

Well... Went for a VSSI in December... Paid $400. Got a list…read moreof things to fix which they did...I use that phrase very loosely.. $2400.00 Later...2 days.. Lost two days of work March 2026 In May it's started making horrible noises.. We checked they forgot to. Replace the differential plug So went back. Because under warranty.. What a joke...47 days later. From June 22 to August 10th.We had no Vehicle, they gave us a loaner after 30+ days but by then only because my husband's Job was at stake.. He missed 5 wks of work...I Will. NEVER. Recommend them.. I Hope this saves someone else's vehicle. Alison and Michael. Rummel

I needed to have my Exotic car's DMV exhaust certification renewed. The car is an 1988. I have…read morequite a bit of angst when every two years the certification has to be renewed. I took the car to TRISTAR. They were WONDERFUL!! They felt my concern. The car passed with flying colors, twice at this time! The people who own/work at Tristar are master mechanics! They were kind enough to give me a referral for an excellent Exotic car repair shop. Since moving to Sonoma County eight years ago I have been in convulsions on where to take my car for engine repairs. Tristar's recommendation was another star on their rating. They should receive 10 stars!!!

Tristar used to be my go to mechanics.I brought my personal vehicles there and company…read morevehicles.It's gone downhill, completely.I recently brought my yukon in because it had a violent misfire under load. Tristar charged me $200 to diagnose the problem. They put a new cap roterand wires in it, charged me more than $600 for that, I don't drive the car much. I recently took it onto the freeway, and after driving a while, the light came on, but it was running fine. But when I try to go up a steep grade, the car just runs very rough won't make it up to grade , and the check engine light starts flashing. So in my opinion, they never discovered what was wrong with the car.They did not find the problem.They just took care of the symptoms, and I looked at my receipt, they never even test drove the car. It had the same mileage going out as it did coming in..I don't know how they can say they repair something if they don't even test drive it