Took the time to fully understand what I needed and then provided clear fair pricing. Quality…read morepacking and shipping. Thank you!

Went on a Saturday afternoon, in and out in 10 min. We always go here for our smog check!read more

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!

Been coming here for years. They always do a quality service for all my cars. Great pricing as…read morewell. Thank you for all you do!

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

Mike made the smog check super easy! In and out in a flash. Was super nice and thoughtful! Would…read morecomeback for any cars I own.

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.

Mike will definitely take care of you very knowledgeable have to stop by if you ever need ac…read morediagnostics very good place to recommend.

Brought my car for an oil change, which is by appointment only. Mike was able to fit me in that…read moreafternoon. Discount to pay by cash or Zelle He turned the AC on for me while I was waiting and very comfortable chairs! Great work and service

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.

Great service provided by Mission Smog Test Only, although they were busy they were courteous and…read morestraight forward about the wait and what costs were as well as info if car didn't pass. Didn't mind as I had purchased Groupon deal--I will be honest at times buying a deal on the Groupon site could be like shooting craps but not for this offer--it was worth it, they did a good job and the equipment they use is up to date. They may not have a fancy, air-conditioned lobby--which is located outdoors under a tarp--it was fine for me as "little heat" on the 25th of August wasn't going to bother me or detract me, nor do they have a big property with lots of parking, which wasn't going to get in the way of me getting my car smogged the same day so my car could meet the DMV requirements. Overall, if you want quick, clear, great service without the frills or gimmicks, Mission Smog Test Only is the place to get your car smogged and get your certificate. The attendants were great, thorough, polite and they did an awesome job! Thank you guys! ;)

Great smog service! Easy and fast. It's alittle hidden but just follow your directions.read more

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