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    Walnut Smog Check

    4.7 (181 reviews)
    Closed 8:00 am - 5:30 pm

    Services - Walnut Smog Check

    Smog check

    Walnut Smog Check Photos

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    Coupon available on their website.
    Angela C.

    I needed to get a smog check for my car, and stopped in. It was early in the morning so I was probably their first customer of the day and there was no wait. Mr. Mohammed was friendly and quickly inspected my car in about 15 minutes. Save a few bucks and pay with cash and look for the $5 off coupon on their website. Credit cards have a 2.75% surcharge. I paid $53 for my smog check.

    Yan W.

    We took our SUV to do smog check and this place is nearby us. We got there around 10:30 a.m. and there were 2 customers ahead of us. It's $58 with certificates (sent to DMV electronically) and I showed the coupon on Yelp and the owner gave us $10 off, $48 out the door. It was fast and easy and we want to support our local business as well. Friendly service and it was done in less than 20 minutes.

    Outside of the business
    Marizza A.

    It was a breeze in park, was there no more than 15 minutes. The person was very cordial. I'll def be coming back.

    2006 mazdaspeed 6

    First off I want to say the help I got from this smog spot was amazing the guy is straight forward but a really good person and kind hearted he helped me the best way he could and that means a lot the quality and customer service was perfect.

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    11 months ago

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    1 year ago

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    11 months ago

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    1 year ago

    Dude's chill. Took less time than I expected and everything went smooth. Great service!

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    Sam S.

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    2 years ago

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    1 year ago

    Easy in and out. No fuss no hassle. Very polite and professional. Good price as well. Accepts credit card

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    Sam S.

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    2 years ago

    Came here for a smog check, was in and out in 20 min. The price was reasonable and the service was excellent. Would recommend

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    Sam S.

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    2 years ago

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    Sam S.

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    3 years ago

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    Sam S.

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    2 years ago

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    Sam S.

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    2 years ago

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    Sam S.

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    2 years ago

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    Sam S.

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    2 years ago

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    Sam S.

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    1 year ago

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    Sam S.

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    3 years ago

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    Sam S.

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    2 years ago

    Service was fast. Take walk-in. There is AC room to sit. Honored the coupon. Good price. Recommended!

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    Sam S.

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    1 year ago

    The staff were very friendly and the process was quick. I was also glad I could use the coupon.

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    Sam S.

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    1 year ago

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    Sam S.

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    2 years ago

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    3 years ago

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    2 years ago

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    2 years ago

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    Sam S.

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    1 year ago

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    Sam S.

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    1 year ago

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    Sam S.

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    2 years ago

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    3 years ago

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    2 years ago

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    1 year ago

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    Sam S.

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    2 years ago

    Good value for your money. Very honest and did fast smog check. Will come back again!

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    Sam S.

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    1 year ago

    Very fast, professional and easy, it just took me less than 15 mins. I am super happy to this service in the area.

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    Sam S.

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    2 years ago

    Prompt and professional service. Great value and speedy service. It's under new management and is even better than ever.

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    4 years ago

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    2 years ago

    Great service at a great price! I was in and out of there in 30 minutes. I will be coming here for all my smog checks! Thank you!

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    Sam S.

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    2 years ago

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    2 years ago

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    Sam S.

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    2 years ago

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    Sam S.

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    2 years ago

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    Sam S.

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    4 years ago

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    2 years ago

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    Sam S.

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    Page 2 of 5

    Ask the Community - Walnut Smog Check

    Are there free retests if the car doesn't pass?

    No! I would take it someone else. He'll make an excuse for a retest which he will charge you more for later. The previous owner was good.

    Don’t See Your Question? Ask Away!

    Review Highlights - Walnut Smog Check

    It was late afternoon instead of early morning like last time but the same quick, efficient, and professional service.

    Mentioned in 13 reviews

    Read more highlights

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    Patrick's Auto Center

    (381 reviews)

    My car needed both low beams replaced, an oil change and a tune up. Matt was quick to provide me…read morewith a quote that was reasonable. Scheduling the appointment was easy. Brought my car in, went over some paperwork and was told I'd be contacted once the inspection was complete. Sure enough Matt called me to let me know there were some items found during inspection and which ones needed to be addressed right away. After agreeing to the updated quote they got to work. I came back to the shop prior to being told my car was ready, and I think there may have been a delay in getting parts needed (dropped the car off at 9am, wasn't done until 4pm). Other than that, the quoted price is what I paid, there wasn't any pushing to buy a service that wasn't needed. I will definitely be bringing my car back for the additional work needed.

    I requested a quote through Yelp and my request was sent to multiple auto shops. I chose this…read morecompany based on location and called ahead to confirm they could do more than just read basic codes. I had already done my own diagnostics and knew the car was running rich. I had ruled out the upstream O2 sensor, catalytic converter (both new), MAP sensor, and fuel injectors. I explained all of this to Matt before bringing the car in. He assured me they could perform deeper diagnostics with their equipment. After dropping off the car, Matt called and told me they had "confirmed" exactly what I had already told them, and that the next step would be pulling spark plugs--for an additional fee. At that point, I decided to go elsewhere. What I don't understand is why I was still charged the full $85 diagnostic fee, plus a $4 hazardous materials fee and $3 shop supply fee. Plugging a car into a diagnostic scanner does not generate any hazardous waste--no fluids are drained, no chemicals are used, and no parts are replaced. There's nothing about a basic scan that would justify a hazardous materials charge. That kind of fee typically applies when disposing of things like oil, coolant, or other regulated waste, none of which occurred here. In the end, I paid $92, wasted time and gas, and learned nothing new. The most concerning part was Matt admitting he didn't even know spark plugs would need to be checked as part of further diagnosis.

    Walnut Smog Check - smog_check_stations - Updated May 2026

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