Auto Guys

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

No. Auto Guys 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.

Auto Guys is open Monday 8 AM to 5 PM; Tuesday 8 AM to 5 PM; Wednesday 8 AM to 5 PM; Thursday 8 AM to 5 PM; Friday 8 AM to 5 PM; Saturday 8 AM to 3 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

Yes. Auto Guys accepts walk-ins, so you can drive in without booking ahead.

Auto Guys accepts Cash, Credit Card.

Auto Guys has held a BAR smog license since 2018. You can verify the license status at bar.ca.gov.

Auto Guys 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 (760) 510-1688 for a quote.

Auto Guys does not take online bookings here, but walk-ins are welcome. Call (760) 510-1688 to check the wait.

Staff at Auto Guys 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 Auto Guys 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 San Marcos are Santa Fe Auto Repair and All Autos Smog (0.2 mi). Both are listed further up this page with their ratings and hours.