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    Smog N' Tag

    4.0 (8 reviews)
    Open 8:00 am - 6:00 pm

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    9 months ago

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    21 days ago

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    7 years ago

    Great service!!! Quick painless and friendly, I am bringing all of my cars back here. Great time..

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    7 years ago

    Great service, stayed late to accommodate. Thanks for taking care of us. Highly recommend

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    7 years ago

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    USA Auto Service North Boulder

    USA Auto Service North Boulder

    (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.

    Smog N' Tag - smog_check_stations - Updated August 2026

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