Prof Smog                     730 San Pablo Ave Bldg 5 Unit 1, Pinole, CA 94564     510-724-9753

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Smog Testing & Certification Station

DMV • Regular • Test Only • STAR
Cars • SUVs • Vans • Trucks • Motor Homes & RV's


Prof Smog specializes in smog testing and certification in Pinole, California, serving Contra Costa County. Prof Smog is an owner-operated business and is ASE certified. We smog test and certify vehicles whether or not they are required to go to a Smog Test Only Center or a STAR Certified smog station - Prof Smog is Test Only and STAR Certified. We've been in business for 15 years, and our owner has 23 years of experience. We offer smog and emissions tests at competitive prices, and if your vehicle passes, we'll issue your certificate.

We believe in a clean environment and clean air for us and our families. Our objective is to pass the vehicles that should pass and fail the vehicles that should fail. We believe that in this way we are doing our part in helping the environment as a business and offering our customers the best service we can. When a vehicle fails the smog test, it indicates a potential problem on the vehicle that needs to be addressed. This may help improve vehicle performance or mileage. Also, we believe this may be why we are not just STAR but one of the higher performing STAR stations. Please view the Links page for more information. Thank You.

Most other smog stations only take customers on a first-come, first-serve basis, possibly creating long lines and wait times. Appointments are available and currently needed so that your service is prompt. On time appointments have priority, but we may take drive-ins if time is available. Contact us at 510-724-9753 (or if email use smog for the subject line - I usually respond more quickly to telephone messages) today to make an appointment! 



Prof Smog, Auto Smog Inspection, Pinole, CA


Come see us for smog testing and certification.

Please Bring Your DMV Renewal Slip.

Please be aware that mapping programs do not necessarily lead you to the correct location - see location page for further information

Car - Contact us in Pinole, California, for smog and emissions tests, and smog certification. Traffic - Contact us in Pinole, California, for smog and emissions tests, and smog certification. Car - Contact us in Pinole, California, for smog and emissions tests, and smog certification. Traffic - Contact us in Pinole, California, for smog and emissions tests, and smog certification.

As a test only station, Prof Smog offers smog testing services only. We do not make repairs. We test most vehicles from cars and trucks to motor homes, and prices will vary depending on what type of vehicle you have. For most vehicles, smog testing is complete within 30-60 minutes, and we have a waiting area for your convenience. We accept debit cards, cash, and most major credit cards (Visa, MasterCard, Discover) for payment. Contact our smog and emissions testing station today!

Contact us in Pinole, California, for smog and
emissions tests, as well as smog certification.
(866) 577-8797(866) 577-8797 or (510)724-9753(510)724-9753



no coupon required

1996 & Newer $45.75* + Certificate

1995 & Older $59.75* + Certificate

DIESELS $65.75* + Certificate

Certificate $8.25

*Please call 510-724-9753 for further information

NO ET FEE (Electronic Transmission Fee)

NO LPFET FEE (Low Pressure Fuel Evaporative Test Fee) 

Currently, in most cases excluding aborted tests or vehicles that won't start on their on power (If more than one battery, primary battery for starting and driving only shall be used),  unlimited reduced price (1/2 regular price) retests are available (within 2 calendar months of initial test).*

Appointments allow you to be in and out more quickly

Your Time is Valuable and Same Day Appointments May Be Available


Regular Hours - Most Weeks

Mon - Sat   9:30-11:30 & 1:30-5:30

by appointment

If out, please leave message


Please check Tentative Current Hours below in white for most current information.

Closed for holidays and breaks

 Appointment needed

We may be out when no appointments are scheduled

If out, please leave message

Information requested includes name, phone number, and vehicle year, make, model, and license plate number


Tentative Current Hours

Appointments are needed

We MAY be out when no appointments are scheduled


Most Weeks

Monday            9:30 - 11:30 & 1:30 - 5:30 by appointment

Tuesday            9:30 - 11:30 & 1:30 - 5:30 by appointment

Wednesday       9:30 - 11:30 & 1:30 - 5:30 by appointment

Thursday          9:30 - 11:30 & 1:30 - 5:30 by appointment

Friday               9:30 - 11:30 & 1:30 - 5:30 by appointment

Saturday           9:30 - 11:30 & 1:30 - 5:30 by appointment



Wednesday, Feb 10, 2016 closed

drive-ins are accepted IF time available

closed for lunch, breaks, and holidays


If we do not answer, please leave a message that includes name and phone number so that we may contact you.

Also, please do not request an appointment between 11:30 & 1:30 or a day that we will be closed.

We apologize for any inconvenience this may cause.

Thank You.

Please pay DMV fees on time to avoid DMV penalties as stated on the back of the DMV renewal notice.

Online: Even if the first line says that the online registration cannot be completed at this time, please read the statement in it's entirety - you may still be able to pay the fees, and you may receive a Notice of Incomplete Renewal. This does not make it legal to drive the car after the registration expires but at least you may avoid DMV penalties. Temporary operating permits or one day moving permits may be available - if needed, ask DMV.

Please note that we may be out sometimes. Appointments are needed. Breaks will be taken. we close for lunch. Prior customers may be able to make earlier, later, or lunch hour appointments by prior arrangement.

Thank You.

We try to respond to phone messages 510-724-9753510-724-9753 in a timely fashion and sometimes use call forwarding. Phone messages usually are answered more quickly than emails.

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We currently accept:     Cash  Debit  Discover  MasterCard  Visa