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    Royal Smog & Mechanic

    4.1 (79 reviews)
    Open 8:30 am - 5:00 pm

    Get pricing & availability

    Response time

    50 minutes

    Response rate

    100%

    Services - Royal Smog & Mechanic

    Auto battery and fluid recycling

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    Reviews With Photos

    My "Hoopty"
    Lauren S.

    I'm so grateful to the guys who helped my classic 1989 Volvo 740 GL sedan pass smog for the next couple years. After having so many different car woes within the past 2 years...it was such a relief to have a back up hooptie to roll in. Went to another trusted smog center in town who were unable to pass the car because I had an after market part installed that made it impossible to get a true reading from the muffler. I was then reccommended to Royal Smog who took me in at the end of the day. The Bmod (Boss man on duty) Sam & his team were able to diagnose0 the problem. (I was chauffered home by the boss himself; who also happens to be nice on the eyes(lol).I only had to wait a day for my muffler to be fixed and have the Volvo running like brand new. It cost me a few Benjamin's...but well worth passing smog for another 2 years and is a quiet as a mouse when im rollin around town. If I decide to keep this car for a little while longer...im definitely coming back for future tune-ups! Ciao for now...

    I went there for the first time because the regular Smog shop was closed. I was told it was $98 and when asked for any coupons, I was advised there aren't any. The employee gave me a $10 off coupon as a courtesy. A friend of mine got theirs for $48 by walking in. I was not even told there are Yelp coupons. I messaged the business via Yelp and there was a lack of professionalism. I will never go there again!

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    2 months ago

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    1 month ago

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    2 months ago

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    4 months ago

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    2 months ago

    The staff was so nice i love the place including Ameer and sam they gave me love and a good price

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    1 year ago

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    Sakher A.

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    2 years ago

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    Sakher A.

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    4 months ago

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    1 year ago

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    Sakher A.

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    2 years ago

    Awesome work. Took my car in. Told them what needed to be done. And an hour later ready to go. Thank you Sam and crew!

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    Sakher A.

    Thank you for your review

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    2 years ago

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    1 year ago

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    Sakher A.

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    1 year ago

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    1 year ago

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    8 months ago

    this is a very good place to go i took my lincoln there for a smog and they gave me a fair price THE BEST PLACE IN VALLAJO!

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    2 years ago

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    Sakher A.

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    2 years ago

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    1 year ago

    Super quick and efficient! Great customer service as well. Will definitely be taking all of my cars here.

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    3 years ago

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    2 years ago

    Es primera vez que vengo hacer el Smog check, y servicio al cliente fue muy bueno, el tiempo de espera fue bastante corto.

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    3 years ago

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    3 years ago

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    3 years ago

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    4 years ago

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    3 years ago

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    2 years ago

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    3 years ago

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    3 years ago

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    4 years ago

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    4 years ago

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    4 years ago

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    2 years ago

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    Sakher A.

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    3 years ago

    Perfect work, perfect service and perfect price! So quick and a friendly environment as well!

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    Sakher A.

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    4 years ago

    Super nice and fast!! Very nice people and great if you use the coupon on yelp. will come back

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    4 years ago

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    6 years ago

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    Page 1 of 2

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    Review Highlights - Royal Smog & Mechanic

    this is my second time coming to this shop and both times Sam went above and beyond to make sure i was taken care of.

    Mentioned in 13 reviews

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    All Star Smog

    All Star Smog

    4.9
    (119 reviews)

    If you're on Yelp trying to decide on a smog shop, then give All Star Smog a chance! My experience…read morewith them (first time, first impression) was great. We needed a smog done on short notice--I did a quick Yelp inquiry, the shop owners/staff messaged back quickly, and the next morning we dropped in. Went in Saturday morning--the (covering) technician was courteous, friendly, and professional all around, and we didn't feel intimidated as maybe you would at other shops. The technician (we didn't catch his name) was also very transparent, as he advised us on searching how to properly "drive cycle" our vehicle in order to reset the monitors after the first smog attempt read: "monitors not ready" -- DRIVE CYCLE? Yes, we learned something new that day! We prepared our vehicle to sit overnight, then did the drive cycle early Sunday morning right before returning to All Star Smog for the retest. Same technician was there and helped us out right at 9am. He also gave us a friendly recommendation for additional DMV services that we needed to complete. We all know that car services can most of the time be dreadful, but I can say that this was my best ever smog experience, between CA and NV. Thank you, All Star Smog!

    If you want a reasonable priced smog you should check out All Star Smog. I went there today. The…read moreservice was great! Owned by a family and run by women. Basically in and out in like 20 minutes. They have a discount coupon right now. Very friendly! Located near the Courthouse. I highly recommend this business! Phone number 707) 731-9954

    Royal Smog & Mechanic - autorepair - Updated August 2026

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