Smog Frog Santa Rosa2018-11-03T15:11:18+00:00
Smog Santa Rosa


Smog Check


Sonoma County’s Friendly Smog Shop

(707) 888-7732
 to schedule your smog check today!
Hablamos Español!


6050 Sebastopol Ave. (Hwy 12)

Sebastopol, CA 95472

*between the Chevron Station and the Grange Hall on Highway 12 at Pauline’s Automotive

Monday through Friday, 8am – 5pm
Saturday and Sunday, 8am – 5pm

(707) 888-7732





Question: How much is a smog check?
Check our Pricing tab!

Question: Do you smog…?
Answer: Yes! We smog diesels, hybrids, RVs, and everything else in between. Does your DMV Renewal notice say, “TEST ONLY” or “STAR SATION?” We smog those too. Make your appointment today!

Question: Is there anything I can do to help my car pass smog?
Answer: Here are a few things we recommend before getting your smog:

Gas. It is a good idea to fill your gas tank.

Gas cap. Be sure your gas cap fits tightly (3 clicks to tighten generally). If your gas cap is older and has cracks in the seal, replace it.

Oil change. Get your oil changed regularly and make sure you’re not overdue for an oil change when you come in for a smog test.

Check Engine or Service Engine Soon light. If your check engine light is on, get it checked out, fixed and turned OFF. Be sure to drive it around for a few days, especially at steady freeway speeds, to set the drive cycle monitors before getting your smog test.

Battery replacement. We also recommend driving for a few days before your smog test if you have recently changed the car’s battery.

Worn hoses and parts. Holes or cracks in hoses and parts should be looked at and repaired prior to testing.

More information. For more information on setting your drive cycle monitors, you can often google “drive cycle” and your car year, make and model to get specific instructions.  And remember, just let us know when you arrive and we can check the monitors to be sure its ready before the test!

Re-tests. If you are returning for a retest, always bring your repair receipts and original test paperwork.

Question: I’ve done all of those things and I’m still nervous that I won’t pass. Is there anything I can do to find out if it worked?

Answer: A pre-test might be a good option for you. They cost about half as much as a regular smog and can give you a good sense of whether or not you’ll pass the actual smog test. A pre-test does not count as an actual smog test, however, so it may be better to have the actual test done and troubleshoot a failed test with your mechanic. Please feel free to talk to our technician about whether or not a pretest is right for your situation.

Question: Do I need to make an appointment?
Answer: We recommend making an appointment, but we understand that that isn’t always possible. Because of this, we schedule ample time for appointments in order to serve drop-in customers between scheduled customers. Just note that some vehicles take longer than others and we give priority to those who have booked their time in advance.

Question: How long does it take?
Answer: Test length varies by vehicle, but the year can be a very good indication. Cars newer than 2000 can usually be done in 10-15 minutes, while older vehicles might take 45 minutes to an hour.

Question: Do you take…?
Answer: We accept cash, check and all major credit cards.

Further questions? Call us at (707) 888-7732.

Regular Smog Test






Smog Certification


Tire Pressure

  • Upon Request

Pull Codes for Check Engine Light

  • Upon Request

Test Add-On: Bar95

  • *May be required for some older cars

Test Add-On: Evap

  • *May be required for some older cars


At Smog Frog, we want what you want…

  • … to get your car certified and back on the road!
  • We want to be on your team; your needs are our top priority.
  • We understand that your experience with us can impact your entire day; we want that experience to be a positive one.
  • Nobody wants to have to get their car smogged; we want you to leave feeling happy that you chose us.
  • We authentically care about you and our beautiful community!
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