Smog Masters

Yes. Smog Masters is STAR certified with the California Bureau of Automotive Repair, so it can test vehicles the DMV directs to a STAR station, including gross polluters.

No. Smog Masters 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.

Smog Masters 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. Closed Saturday and Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

Yes. Smog Masters accepts walk-ins, so you can drive in without booking ahead.

Smog Masters accepts Cash, Credit Card.

Smog Masters has held a BAR smog license since 2013. You can verify the license status at bar.ca.gov.

Smog Masters 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 (209) 529-8149 for a quote.

Smog Masters does not take online bookings here, but walk-ins are welcome. Call (209) 529-8149 to check the wait.

Staff at Smog Masters 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 Smog Masters 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 Modesto are Sam's Complete Auto Inc (0.5 mi) and Titos Smog And Auto Repair (0.5 mi). Both are listed further up this page with their ratings and hours.