Super easy and quick - no appointment needed. Probably in and out within 10 mins. Current price for…read morea smog check in April 2026 is $60 cash ($65 credit). - Saturday hours are great (8am-2pm) - Enter into the garage area from Greenwood St (not Walnut) - They do a few other services like oil changes The only other thing to highlight is that there is a small fee to retest if the car fails the smog check. You can share with them that you are not sure if the car will pass smog and they can try to do a few basic things to gauge right off the bat which we appreciated. Other places may do re-test for free if you do the initial smog check with them (but possibly higher in overall price) so keep that in mind.

The couple who runs this have been doing this for years, they get to it right away, sometimes…read morethere's a line of cars but doesn't take very long. Needed a smog check to renew my registration.

Had an EXCELLENT experience here this past week! Great communication via projects on Yelp (which…read moreI'm usually sketchy about), answered all my questions and reserved me a spot for the next day that accommodated my hectic schedule. Arrived at the garage and fast quick service, especially with a smile which is rare these days! Would definitely recommend!

Felt very welcomed and was helped with a sense of importance and patience!!! Unfortunately, my car…read morefailed the initial smog test. However, they walked me through my options and truly looked out for my best interest! After having to drive for some miles....and following their instructions, they re-tested my car and IT PASSED! They took a frustrating situation and completely turned it into a positive one by being so calm and reassuring. Thank you again Hill Smog! keep being a great service center for your community!

Ara and the rest of the team are absolutely amazing. Very honest business and they always have my…read morecar finished before expected. I've had both cars smogged here and additional brake work done. They have a 5 star reputation for a reason.

Ara is a refreshingly honest young man . The service is fast and reliable. Best smog place ever…read moreafter many years of being lost . Ara has been found . Thanks

Very nice owner! Highly recommend!…read morePlease go there if you need a smog test. Price is good.

I was really not looking forward to spending more of my precious time and money on a smog check…read moreordered by the kings of California. The two previous places I got these done seem to be no more, so I decided to try Vista Test Only. I am very happy with my decision. First of all, it was like 100F out, and the owner Sam handed me a chilled bottle of water. Then, some chocolate. Then some walnuts. He also brought over an air conditioning unit and pointed it right at me. Wow! He was also extremely friendly and seemed to genuinely enjoy talking to and learning about his customers. He even helped he find a place to grab lunch after my test. And if all that wasn't enough, he also charged less than the other places I called up. Next time I need a test, I'm definitely going back to Vista!

I have been meaning to write this review for so long, probably almost a year…read more Hands down, this was absolutely the best smog experience I've ever had. The service was amazing, incredibly friendly and quick. I called in to see if they had any availability, and said to just come on by. Of course, in the 5 minutes it took for me to drive over there, a couple other customers got there first haha, but all good I really didn't mind waiting a bit. I can't remember what I paid, but I know for sure it was the best deal compared to all the other smog check businesses that I called. Both my car and my wife's car have to be smogged every couple years due to their age, so we'll definitely be back here soon. Thank you so much! Truly the best 5-Stars all around.

Excellent + efficient service, in a comfortable environment and convenient location! I called this…read moremorning first thing to see if they could do the STAR Smog Test on my 2012 Nissan Juke before I went into work and they were able to accomodate - and I was in/out in 30 minutes. Owner Fred is kind and gracious. I'm glad I took my car here today and will continue to until I stop getting these notices!

5 stars Excellent…read morecustomer service Efficient Good pricing Comfortable waiting area for customers :)

Was able to do smog check on rv. Provided needed service…read morewithout long wait. Would recommend

These guys have been taking care of my cars through the years, from the clutch on my 2013 BRZ back…read morein 2017, brake pads on my Miata NC, our family Accord, and oil changes on my Focus RS. These guys have done an excellent job every time doing what they do well, with full transparency and in an Ernest fashion. I have loved being a local to Pasadena since 2008, and love to support local businesses like CARS!!!

I have been going to a different mechanic for over 10 years. I was I a bind and needed my battery…read morechanged out. it was 5pm my usual mechanic said just come in the morning and we can do it, I couldn't wait till the morning, so I drove around looking for a mechanic and without any issues Certified Auto took my car and switched the battery. They also checked my oil and topped off (I was extremely low). Today I came in to ask a question about my oil. They noticed I was past due on my oil change and said we could take you now and have you put in an hour. This would have never happened at my old mechanic. To be seen by them you have to go first thing in the morning leave your car and hope they call you same day to say it's ready for pickup. I would definitely recommend come here. Fast efficient and worth your time.

Vick at Express Smog Test Only Center provided outstanding customer service from start to finish…read more He was prompt, friendly, professional, and incredibly efficient. The whole process was smooth, stress-free, and much faster than I expected. Vick went above and beyond to make sure everything was handled with care and explained clearly. Without a doubt, this is the best smog test service in town. It's rare to find this level of excellent service these days. I highly recommend Express Smog Test Only Center if you want honest, reliable, and top-notch service!

I picked this place because of the stellar reviews and everyone was right -- Vic is the absolute…read morebest!!! He explains everything very thoroughly. He's easy to talk to, respectful and efficient l. My car failed the first time because of a memory issue from a recent repair. He gave me clear instructions. I made an appointment to come back and he helped checked to see if there were any glaring errors before retesting. Ended up passing which is great! Def come here to do your smog checks! Vic is your man

I still take my 2017 Mazda 3 to Emad and I will never go anywhere else…read more Emad is the man! I also appreciate how he texts reminders for oil change and maintenance etc. Thank you for keeping my car running smoothly over all these years, I want to drive my Mazda until 100K miles. I am grateful for you guys!!!

It was finally time to get my new-ish car serviced and so after doing some research and even asking…read morea few AI chatbots, I settled on this spot after reading lots of great reviews. I called ahead to confirm if they could make time and we agreed on a date/time that worked. Upon arrival, the shop was jam packed with tons of cars. Feeling a bit worried that my check up would take forever, they quoted me about 1.5hrs to do the standard checks including brakes, tires, fluids, and oil change and it actually ended only taking 1 hour! Very thankful that they were able to squeeze me into their busy schedule and take care of my car efficiently with friendly service! They've won me over and I'll definitely come back again in a few months for the next service date. What's also great is there are a lot of pretty decent spots to eat and even a few nice bakeries too while you wait for your car to get serviced. Highly recommend giving them your business!