Diablo Mountain Valley Smog

Great price!!! Don’t be fooled into paying $ 80 across the street for the SAME service! Quick & friendly

Took my car in for smog check. People who worked on my car were struggling with the basics. 20 min was spent on figuring out what kind of engine I have and where to hook up the diagnostic parts. Took them 40 min to complete the smog check when i was the only customer around. Smog check cost 65 dollars which might be more expensive than most places?

Great price. Great Speed (in and out in about 20 min). Friendly staff & my SMOG TEST passed :)
What’s not to like.

I use to go here to get my smog done but not now. I found 5 coupons in Valpak for smog checks in the Walnut Creek area all under $ 25 plus cert $ 8.25. The Smog Center would not match their competitors prices.
This place was going to charge me 3 times what I paid at the 76 station across the street.

Stay away unless you like paying twice as much as normal. You get your certificate, but they are incredibly overpriced with the potential for other add on fees. I used them in the past, and it was reasonable, but things have changed. I should have Unilocaled them before going.

Horrible, RUDE, Rip off artist! The horrible customer service began as I stepped into the small dark shop. Both employees just stared at me with not even as much as a «Can I help you?» I state, «I need a smog test. The employee behind the counter (who is on his cellphone) does not even acknowledge my existence and continues on with his conversation. The other employee or owner looks at the goof behind the counter and gives him the get to work nod. Not missing a beat on his important cellphone conversation he snatches the keys off the counter and jumps in my ride. He parks my car in the garage and proceeds with the smog test (yes, still on his damn cellphone). He runs my car about 5 minutes before hooking it up to the testing equipment. After the test is over he comes back into the office leaving my car running for another few minutes before handing over the paperwork to the «boss».
The «boss finally opened his mouth to say, «Everything fine, $ 63.22, sign here.» When I pulled off, pissed to the highest pisstivity level, the jerk was still on his cellphone and the boss just threw my paperwork over to the side. Had I not been in a rush to get my smog (so I could complete my DMV registration) I would have walked right out of there!

Worst place ever. First off the guy smelled heavily of cigarettes so I didn’t like the idea of him sitting in my car (which he did for a while because he couldn’t figure out which button changes the information on my display to allow him to see my odometer) Then the guy tried to charge me $ 109 PLUS the $ 8 certificate fee. I asked him if that was standard price around here because the last time I got a smog check I remember it being under $ 40 dollars. Then he offers me $ 50 plus the certificate fee. I’m pretty sure he was trying to make a quick buck off the fact that I’m female, but little did he know my boyfriend’s family is super into cars and I’m not a complete idiot.
I pulled up my phone to compare prices around there and quickly found a place offering $ 38 out the door. I told him I was leaving and he tried to haggle with me, but I didn’t like his dishonesty and told him no thank you. He kept hassling me so finally I just walked over and got in my car. He pokes his head in the window and continues to question why I wont use his services. I told him I liked the other place’s business plan better. Then he asks me if I want my paper work back. Obviously I want my paper work back and I can tell he isn’t going to hand it over without an argument. At this point I’ve lost all patience and tell him he can hand me my DMV papers or I can call the cops. He gave them to me, but then made me get out of my car so he can back it out of the shop. I was very frustrated when I left. This place is horribly dishonest and the guy is way too shady for my comfort level.

The way they do business is super disgusting, not ethical.
I was at DMV and I need smog certificant. I called and they told me the price is $ 64.95. I drove in my 2007 Honda Accord and it took 50 min even though I was the only customer. No one informed me when the work was done; my car was left there with air conditioning and everything on, windows open. They charged $ 108.2 on my credit card. For some reason, I did not pay attention to how much they charged and left.
When I noticed the $ 108.20 on the receipt in 3 hours, I went back to argue for $ 40 refund. They laughed ‘we are not going to give any refund, what can you do?‘
They cheat, charge 3 times of other smog stations, and they care nothing about reputation. You can do smog check right across the street, stay away from this place.

I drove my 2002 Mazda Protégé in for standard DMV-​mandated test. When I was quoted $ 108.20 for the job, I was shocked and protested. OK, they said, with the discount it’s only $ 73.20.
For some reason, I didn’t drive off screaming although I should have. (I soon learned that this was almost TWICE the standard price around here). Although they did complete the job in about 20 minutes, the techs were sullen and unfriendly, barely making eye contact with me. A totally yucky experience.
THIS JOINT IS A RIP OFF. DON’T EVEN THINK ABOUT EVER GOING HERE!

This place blows!!! I want to give it ZERO stars. The coupon is misleading when it claims to take 15 minutes. Reality is it takes an hour. Just had to pay extra fees from the DMV since this place never sent my electronic certificate. Which I paid extra for. When I called and asked them to send it again, I was told «If you still have the paper work, take it to the DMV». Thanks dip shit.

I brought my truck to this location to be tested because I had received a discount coupon in the mail. Don’t be fooled as I was. Even with the discount, the test came to over $ 100. After waiting for an hour, the technician informed me that he could not figure out how to test my Ford F-​250 truck, and send me on my way with no test results but no charge. Later the same morning I found a nearby competitor who tested the truck in all of 15 minutes and charged me only $ 75.

Great place. I took my truck there to get smogged. They were friendly, fast and well priced. I was in and out in less than 30 minutes. I will take all my vehicles there to get smogged.

I had the same experience as the last poster. They knew I would fail before running the test as well, as the PCV valve was very obviously disconnected (wasn’t obvious until my brother later showed me where it was-​right on top of the engine in plain sight). They had no problem charging me the $ 89.00 to tell me the car had failed because of this. If he had pointed it out to me, I would have simply stuck the hose back on right then and there. Instead I went home, re-​attached it, brought it back, and SURPRISE! another $ 45.00 later the car passed. The smog tech was completely unfriendly, and the cashier who informed me of the problem told me, when I asked what it meant, shrugged and said «I dunno, this is why it didn’t pass.» Thanks.

I finally figured out the address of this place — the actual service date was back in September.
Right after moving from NY, I took my car here, because DMV told me I needed to have it smogged. Smog? Whazzat? I already passed NYS Emissions (same as CA) along with the safety check, which by the way you don’t do in CA (brakes, who needs em?).
Anyway, this place was right behind DMV, and I was delighted to be able to go right in and get tested — this after spending 2 hours at DMV was a pleasant surprise.
I asked about the cost, and they told me $ 99. I asked if it was like NY, where the cost of emissions testing is mandated by the state, and they said «Oh yes, but we are the only ones who allow a free retest».
LIARS! The next day in the paper I saw an ad for $ 39 smog test with free retest. Way to rip off a customer guys.