great service, in and out within 30 minutes..always come here when it's time for a smog.

Very friendly, fast and professional! Thank you ! Comfurtable waiting room , TV I recommend this business !

Great service! Silvino got my smog check done in about 15 minutes. I went around 8 AM, no appointment needed and no line at all. Super quick and easy experience. Highly recommend! read more

Only 1 customer ahead of me. So it was pretty fast. About 25 minutes completed. Pass smog. $69.00 for everything.

I came in the afternoon. There was probably two others ahead of me for a smog. I had a coupon advertised on their website for a good discount. I think I waited 25mins and I was in and out. Quick easy service. read more

I called in the morning before going to the shop as they recommended. I got there within 10-15 minutes, I was already next in line, & the service was quick taking only 10 minutes. read more

I was looking for a local shop to take in my Jeep for a smog test. I came in an hour before closing and found very fast and friendly service. I was in and out in no more than 20 minutes! I brought my DMV paper with me and they handled the rest. I was also able to use their online coupon which I appreciate and made it all a very reasonable price! read more

I needed to stop by for a smog check and fortunately this crew came through and in a timely manner especially on a rainy day. Everything was done within 15mins after they took the car in the garage. Value for the service is pretty competitive among other stations, but the coupon (which is still applicable) helped saved me a few $$ after I just paid a late fee with the DMV. read more

Called a few minutes ago because I had a question about getting smog check and tags done. Never had someone be so quick to be so rude. Place looked convenient and was just about to head in after I called. Safe to say, do not go here. read more

Better than AAA! The girl work at here she can speak basic chinese very helpful! The best thing is this location has DMV service and Smog check all in the same roof . Save us time and reasonable price! Overall I recommend for all of you don't want to drive to AAA nor DMV. read more

Came back to get a smog check. Same fast in and out service. Also bonus that the owner is learning to speak Mandarin. Was actually pretty spot on for the basic level communication. read more

Piedra's Smog Test Only - Entrance - Smog Check Stations Near Me - Walnut, California

Very good service. They are very quick and staff was awesome. Highly recommend getting smog check here. Make sure to use the coupon on Yelp for great discount read more

Piedra's was the place that I was told to visit after I got the dreaded letter from the DMV. It took about 20 minutes to check my beater of a car. It passed, and that was all I cared about. $55 was all it cost me. They weren't cheaper or more expensive than other places. What more can I say? read more

Had my smog check done at Piedras after my mother in law had hers done here. Fast, convenient and a good price. Definitely recommending as well. read more

It was a last minute appointment but they took us in right away. Super efficient and great customer service!

Quick service at an affordable price. My new go to spot for all my cars! The worker was kind and professional, what more can you ask for?

Professional and fast service with great support before coming in- definitely will recommend and return. Great value with their coupon too.

My go to spot for star certified smog tests! Fast, friendly and efficient service. They also have a waiting room with AC and vending machine. There's usually some type of promo you can apply on the pay,ent so be sure to ask the front clerk. Recommend going on weekdays to avoid weekend rushes as the parking lot is quite small and gets crammed easily. read more

Go to place for smog. Local and reliable. Very helpful. Waiting room is air conditioned and clean

Took my Honda Civic I was in and out 10 min Very good customer service I would definitely Recommend read more

Easy, fast service. Super simple process. Drove up with no appointment and was out in 15 minutes.

Love this place. Down to earth smog center but great service at a great price. They're usually very quick and doesn't make you wait too long. The lady behind the counter is courteous, helpful, and always serving you with a smile. The only place I take my cars to smog! read more

Found Piedra's Smog Test Only on Yelp after sitting at other test station up the street that never opened. Took my grandma's car right away. Only waited 20 minutes! Will come back again! Mahalo for the great and fast service! Don't forget to check in for their Yelp special too! read more

Extremely Fast, Helpful, Honest. When I say fast, I mean the fastest I have ever been to in my years. Also one of the more reasonably priced for the value of the service. read more

Took my 1992 Miata on for a smog check. I was a walk in customer and was in and out in no time! That was with 4 other ahead of me. Fast and reliable tests, they also where able to handle my DMV registration and hand out the tags right there! Really happy with Piedra's and highly recommend it as a place to do smog checks! read more

Piedra's Smog Test Only - Waiting Room, cool vintage Kobe vending machine! - Smog Check Stations Near Me - Walnut, California

Our go-to smog only test place - family owned and honestly the best prices in our area!

Came in for smog check recently but did not pass. My van was "cold" and the test could not get all the readings somehow. Eva recommended to drive it a few more days around town and come back for the retest and it passed! Happy about that. I always bring the coupon with me but It got overlooked this time, however, Eva corrected it and gave me a credit from the full price. I've been coming here for years for my vehicle tests and they are friendly, considerate and helpful. read more

Our usual smog was closed down...and now we found our next go-to smog spot. The Piedra's are good people give them a try. Easiest in and out, and it didn't cost an arm and a leg. read more

Silvino helped us out majorly with my car amazing local business go check them out. We had one issue and he explained to us how to go about fixing and we did it and our car passed when we came back a week later. The price is a very good and affordable. I highly recommend coming here. read more

Fast, friendly and honest! Family owned and they offer auto insurance as well. Support local businesses!

Great service, friendly staff, fair price. I was in and out in 15 mins. Highly recommend this shop.

I took my car here for a smog check and I was out of here in 15 mins. I would definitely recommend this place. 10/10 and I will be taking my vehicle here from now on. read more

This place is a one man show, he helps with the customers, do the inspection, and collect payments. The smog inspection was quick and easy. I was in and out less than 30 mins, I was the second customer. This guy works hard, if is not his own business. He deserves a raise. read more

This is the first time I been to this place for the smog check, I definitely will come next time and I strongly recommend this place!

Very quick and easy process! And front desk worker was welcoming! :) also had a coupon!!

Needed a Smog Check fast and found Piedra's while driving around. Very courteus staff and quick service! Nice air-conditioned waiting room too during this hot read more

Piedra's Smog Test Only - Piedra's Smog Check waiting room. - Smog Check Stations Near Me - Walnut, California

GREAT FIRST CLASS SPEEDY SERVICE, Also even did my registration here too ! Will definitely be back for future service read more

Fast, easy and friendly Painless process to satisfy the DMV. Great local place to get smog check read more

Smog test was quick and efficient! Definitely will go back Waiting area was clean and air conditioned read more

Friendly, fast, and professional. Don't know about you but I'm going to continue taking my car here to smog. Easy decision.