Mr. Smog Check

The owner is very service oriented and helped me tremendously! My car is 10 years old and did not pass the smog test because the catalytic converter is not working properly. He recommended Speedy Muffler in Rancho Cucamonga as the next step. I found out from this muffler shop that my car’s catalytic converter is no longer available from the dealer or aftermarket suppliers. They also let me know how to contact the California Smog Referee program to get a Limited Parts Exemption. After the many steps that the state requires to get the exemption, I completed that process. I talked with the owner of Mr. Smog Check two more times during the process and he helped me immensely!

Went to go get a smog by Chewy he was very kind and helpful, great service, clean environment, and very quick. He also gave us some advice for our car to improve it. Definitely coming back!👍🏽✨

I had a great experience at this smog shop. The service was quick, efficient, and very professional from start to finish. The technician really stood out—he was clearly knowledgeable, took the time to explain everything, and made the whole process easy to understand. You can tell he knows what he’s doing and takes pride in his work. It’s not always easy finding honest and reliable service, but this place definitely delivered. I’ll be coming back and would highly recommend it to anyone.

amazing service, great experience. very fast service and fair price. i was in and out in less than 15 minutes. as a woman, I always get nervous when dealing with any services on my car, but chuy was so respectful and helpful and did not make me feel nervous, dismissed, or taken advantage of at all. i will definitely recommend this establishment to anyone needing a smog check. go to mr. smog!! thank you!

Awesome Customer Service. Highly recommend this place. Fast Service, been coming here for a decade now. Yes a Decade. This place has a nice atmosphere and the owner is very kind and helpful.

This place is amazing they’re fast. He is so so nice and is very very helpful. I 100% recommend this place.

Close to the Rancho Cucamonga DMV I needed a quick smog check. It was quick and easy and I was on my way. Very professional and reasonable prices.

In and out in 10 minutes to get my diesel smogged for $66. Will definitely continue to come here!

Since I am not from the area I was searching based on reviews. But I could not be happier and more satisfied. It was fast, a great deal, and very respectful. Thank you so much!

Great service and quick close to my job thank you very much. I appreciate your work and I’ll be definitely be coming back and recommending you to my people. God bless.