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    Express Smog

    3.6 (112 reviews)
    Open 7:30 am - 6:00 pm

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    Sylvia S.

    Rude, skipped us in line when we had already let him know we were waiting. He was a white guy, gray hair. He didn't let us know pricing until after. Charged $32 dollars and it passed.

    Great guy that runs the place! Nice and cheap, very fast, definitely recommend coming here!:)

    Smog building

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    8 years ago

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    David M.

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    8 years ago

    Drove up at 7:45 am, walked inside to lay and when I returned, about 4 minutes later the guy was finished. In and out. Very happy.

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    Photo of Karyn G.
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    7 years ago

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    9 years ago

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    9 years ago

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    7 years ago

    Fast, friendly and efficient! Thank you for making that dreaded experience a pleasant one

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    9 years ago

    Quick service for smog check and DMV registration. Great customer service as well. Highly recommended to all.

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    8 years ago

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    6 years ago

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    8 years ago

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    9 years ago

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    David M.

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    7 years ago

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    10 years ago

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    11 years ago

    Helpful 2
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    11 years ago

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    12 years ago

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    11 years ago

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    10 years ago

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    7 years ago

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    10 years ago

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    11 years ago

    Thought I had the right coupon and they took it anyways! Very quick and professional. Will be back there next year!

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    8 years ago

    I have 3 vehicles I use him every year for smog and registration renewal. I'm in and out quickly very nice guy!

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    12 years ago

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    8 years ago

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    12 years ago

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    9 years ago

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    10 years ago

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    7 years ago

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    10 years ago

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    Page 3 of 3

    Ask the Community - Express Smog

    So is it only a smog location or can we register there as well?

    Good morning, you can also register your car at this location.

    View All 3 Questions

    Review Highlights - Express Smog

    Quick, efficient and you can pay your tags at the same same for only $10 more.

    Mentioned in 13 reviews

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    USA Auto Service North Boulder

    USA Auto Service North Boulder

    2.8
    (68 reviews)

    Joe is a stand up guy. He has earned a life long customer from my family. Great service. Genuine…read morehumans. I can't remember the lady's name at the front desk but she is also so wonderful. I would refer anyone here.

    I posted a very favorable review several years ago, I won't delete it, however I do greatly regret…read moreit. The ONLY thing I'd trust this place for is a DMV smog check, since they don't have to tinker with your vehicle to do it, and their price is substantially better than most other places. For several years, in-between factory service I had at a local dealership. USA Auto was the *only* place service place touching my car -- doing routine oil changes, radiator drain & antifreeze refill, and diagnosing/trying to fix a AC coolant leak. Despite a couple visits & about $200 to try to fix the problem, they never did get the air conditioning fixed, so I drove for several Summers with NO AC, until I replaced the vehicle. I sold the vehicle last year to a retired Master Mechanic & we actually become friends. He told me the AC coolant leak had just been a simple issue that was a known problem for the make/model/year of that vehicle & cheap & easy to repair. Perhaps more importantly, he'd noticed that many of the plastic pieces used to hold things like the radiator cowling, etc. were either completely missing, or damaged in a way indicating brute-force was used to pull things apart to access things in the engine compartment, instead of taking a few seconds to properly undo them. They can deny it all they want, but I do blame USA Auto for this, and in my opinion, one of the ways their prices are low is because they save labor time by not always doing things the correct way. Since discovering all this, I've learned a lesson and now take my newer vehicle to other places for routine servicing -- yes, I pay more, but I'm convinced I'm better-off in the long run.

    Purrfect Auto Service

    Purrfect Auto Service

    3.3
    (377 reviews)

    We made a last minute run to get a smog test on registration renewal day and it was fast. The price…read morewas $9.99, and the smog check was legit and passed through the DMV with no issues. They quoted me on needing some fluids looked over due to the miles on my car and gave me a breakdown on a piece of paper. We decided not to get any work done on that day, but we walked away pretty happy with the price and time it took.

    Every time we go for smog checks, front counter service has always been terrible. We have 4…read morevehicles and only go to get smog because of the convenient location. Today, service was just as expected - awful. False overhead advertisement $9.99, without advising, rung up at $19.99. When said I thought it was $9.99 as advertised on the overhead, was told front outside window sticker displayed $19.99. If that was the case, shouldn't the overhead sign also reflect that pricing? Used my credit card, and was told AFTER being charged that there is a $5.00 processing fee. If I would've been advised, again prior to finalizing the transaction, I would've paid cash. Additionally smogged another car - I have a 2023 truck. They smogged my truck and again, AFTER THE SERVICE, was told that the first 3 years vehicles don't need smog. I would've appreciated that context before the service (that I have to pay) - or just don't say anything at all. Lastly, as I am waiting in the waiting room, a polite man asked what type of oil they use, employee responded rudely, as the customer leaves - employee comments (in front of other customers) "these people want cheap prices and expensive product". A huge assumption on a simple question that was kindly asked. Customer service lacks, I'm sure mechanical services are good but I can't comment on that part of the business.

    Express Smog - smog_check_stations - Updated August 2026

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