Porsche Marin

No. Porsche Marin is not STAR certified. If your DMV renewal notice says "STAR Station Required," you will need to visit a STAR certified station instead.

No. Porsche Marin is licensed as a Test & Repair station. This station can run your smog test and, if the vehicle fails, diagnose and repair it in the same shop.

Porsche Marin is open Tuesday 9 AM to 6 PM; Wednesday 9 AM to 6 PM; Thursday 9 AM to 6 PM; Friday 9 AM to 6 PM; Saturday 9 AM to 6 PM. Closed Monday and Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

Yes. Porsche Marin accepts walk-ins, so you can drive in without booking ahead.

Porsche Marin accepts Cash, Credit Card.

Porsche Marin has held a BAR smog license since 2019. You can verify the license status at bar.ca.gov.

Porsche Marin has not published a price on SmogCheckDeals. The Bureau of Automotive Repair puts the statewide average at $69.16 as of August 2026, about $65 for a 2000-or-newer vehicle and $73 for 1999-or-older, plus the $8.25 certificate fee. Call (415) 380-8000 for a quote.

Porsche Marin does not take online bookings here, but walk-ins are welcome. Call (415) 380-8000 to check the wait.

Staff at Porsche Marin speak English.

Bring the car, your registration or DMV renewal notice, and a way to pay. Most smog checks take 15 to 30 minutes, and most visits are closer to 20.

Because Porsche Marin is a Test & Repair station, it can diagnose and repair the problem in the same shop, then run the free retest within 30 days. If the repair bill is steep, California's Consumer Assistance Program covers up to $1,200 of emissions repairs for qualifying owners.

The closest alternatives in Mill Valley are C R Automotive and Shoreline Smog Shop. Both are listed further up this page with their ratings and hours.