Quick and honest little smog shop, it's past the car washing area in the back. I was a little…read moreconfused at first. But they were fast and decently priced. Cheaper than most, considering I wasn't trying to drive 17min for 38$ I paid 58$ for the convenience since it was in my way home and I had other errands to run. Update: the other errands to run were an oil change but connected to this place next door they do oil changes. Synthetic blend was their cheapest they don't do regular, but it was the same price as Lenny dykstras and saved me the trip. Although it didn't come with a free car wash like Lenny's, still very convenient.

Returning customer. I was recommended to this SMOG specialty shop in Norco and it's time to pay it…read moreforward. Honest, fast, no hassle service from Ernesto at reasonable cost. Pleasure to reco solid local small business owner. Returning customer. I was recommended to this SMOG specialty shop in Norco and it's time to pay it forward. Honest, fast, no hassle service from Ernesto at reasonable cost. Pleasure to reco solid local small business owner.

- Opened on time - Professional…read more- Completed the work well - Prices were fine - A bit of a wait. but not surprising with one person taking care of EVERYTHING. Would come back!

Excellent quick in and out serviceAfter making appointment for both my car and my wife's we were…read moreimmediately taken care of and prices are fair!

Nice and quick Cash…read morediscounts available Nice and convenient location Kind guy helping

Quick and easy $60 out the door great service I would recommend it this place Mike helped me out…read moregreat guy

Went to do my smog check on a Saturday Afternoon it was quick and cost effective. Their technician…read moreIzzy was very helpful and knowledge. Highly recommend!

From the owner: At Smog M3 Smog Check, we combine speed, transparency, and unbeatable pricing to give you the best…read moresmog check experience in Jurupa Valley. We specialize in test-only smog checks for all vehicles — gas, diesel, and hybrid — with no hidden fees and no unnecessary repairs. What sets us apart: “Pass or Free Retest” guarantee — risk-free for you. We beat local smog prices — bring us a competitor’s price, and we’ll beat it. Fast in-and-out service — most smogs done in under 20 minutes. Modern, clean facility with professional equipment. Convenient location at 8584 Limonite Ave, Jurupa Valley, CA — with easy parking and friendly staff. Open Monday through Saturday, 9AM–5PM for your convenience. Choose Smog M3 for honest, affordable, and hassle-free service that keeps you moving — legally and safely.

I have been visiting this place for over 10 years, and it remains the best choice for my service…read moreneeds. The staff is incredibly helpful and always willing to accommodate my budget with flexible pricing options. Despite their busy schedule, they prioritize communication and keep me informed throughout the process, which I greatly appreciate. Their expertise in their field is evident, and they consistently demonstrate professionalism in everything they do. I feel such confidence and safety in the quality of their work that I don't mind traveling long distances to receive their services. Thank you to everyone for your hard work and dedication!

On Tuesday, I dropped off my car because it was making unusual noises, and I didn't know where they…read morewere coming from. My goal was to have the shop inspect the vehicle, diagnose the issue and provide me with an estimate for any necessary repairs. I was told by Mike they would inspect my car on Wednesday afternoon because they were currently working on another vehicle. On Wednesday I called for an update and was told I would receive a text message since they still had not inspected my car once again. When I replied to the text, I was asked what I needed a quote for. I explained that the entire reason I brought my car in was because I didn't know what was wrong with it. It was making noises and I needed them to inspect it first and tell me what repairs I needed. On Thursday morning. I had to call again and once again told by Mike they were still working on another vehicle. They said they would run my car that day and Mike said he would call me with an update by the time the shop closed at 8:00pm. I had still not received a phone call or any updates that night. On Friday morning, I called again but there was no answer, so I left a voicemail. After receiving no calls or updates I called again during my lunch time. Mike answered and told me he would call me ASAP after speaking with his brother. I told him I would be waiting for the phone call. After waiting 20 minutes without a call, I called back. Mike answered again and immediately said he would call me back with his brother, he didn't allow me to finish speaking so I stopped him so I could simply ask whether they had even started working on my car. He finally told me they would work on it today. I reminded him that they had already had my car since Tuesday. At that point he said " I can't hear you" and then told me "If you need to pick up your car, pick it up". Throughout this experience, there was a complete lack of communication and follow through. I was repeatedly told I would receive updates that never came, and no one was honest about the status of my vehicle. My car sat at the shop for several days without being, inspected, leaving me without transportation and wasting my time. I expected clear communication and a basic inspection, but unfortunately, I received neither. Upon arriving to pick up my vehicle, no one apologized or said anything, handed me the key and walked away. My car was not inspected but ran for 15 miles. Based on my experience, I cannot recommend this shop.

This is a great choice, just go! very fair and very quick. I would choose them over anyone else.read more

Awesome customer service. The workers def know what they're doing. I wouldn't take my cars anywhere…read moreelse but here!

Thanks to Leo for the great customer service! I let him know I was in a bit of a hurry due to work…read moreand he reassured me it would be fast. He definitely didn't lie about that! He explained everything to me really well. Very professional. Overall I recommend to get your smog test here! The price is affordable and reasonable unlike other places that are charging way more.

This place is great!! Leo was friendly and smogged my truck quickly! Will definitely come back for…read moreany other vehicles I need smogged.

My first time getting a smog check, but they were very helpful and knowledgeable here.read more

Went early on a Friday morning to get our Jeep a smog check and I'm so glad I did. Mission Smog…read moreCheck had the most positive reviews, so I decided to trust my fellow Yelpers and they did not steer me wrong. Joey was friendly and a knowledgeable technician who assisted us. He explained the process clearly, answered all our questions and helped us feel confident every step of the way. The service was efficient and thorough and we were in and out in 15-20 minutes tops! What impressed me most was how smoothly everything went the next day. I was able to renew our tags online, and the DMV had already been notified by Mission Smog Check. It's clear they take care of their customers from start to finish.

This place raised some serious red flags for me. I was the third person in line whose car didn't…read morepass, and the two cars ahead of me were also told they failed their smog tests. Seeing three vehicles in a row fail makes you start questioning what's really going on. I understand CARB regulations can be strict, but the process here feels questionable. You still have to pay the full test fee, then come back and pay again (or pay a reduced retest fee) after supposedly fixing the issue. When multiple customers are being told they failed back-to-back, it starts to feel less like coincidence and more like a pattern. I'm not saying every failure is wrong, but based on my experience and what I saw with the other customers ahead of me, I'd strongly recommend getting a second opinion before spending your money here.

Had a great experience here. I looked at there reviews , there are individuals who will speak…read morenegative on shop trying to make it , some individuals will have a bad experience, For me I had a great experience, not to mention I called last minute just before closing time , and they waited for me to Smog my truck ...I was very pleased with the fast experience and fair pricing considering I had drive a big truck and it's hard for most to operate it in tight spaces, This crew made IT happen. Thanks , Definitely my go to now...

I first went to GST two years ago. This year I had a check engine light and it kept me from…read morepassing, Two weeks later and having my car serviced by Tyler Panse my car runs like new ! I was lucky to pull up and get cleared and stopped @AAA to get my Tags for the year .

Jeremy Again Very Professional.. Thanks Green Smog For Your Quick Service !! In And Out In 30…read moreMinutes.. Had My Car Smog Again After 2 Years And In 2 More Years I'll Be Back And I'll Refer This Business As Much As I Can THANKS AGAIN GREEN SMOG