Speedy Smog

Yes. Speedy Smog is licensed as a Test Only smog station. This station performs the smog test and issues the certificate. It does not do repairs, so a failed vehicle has to be fixed elsewhere and brought back.

Speedy Smog is open Monday 10 AM to 5:30 PM; Tuesday 10 AM to 5 PM; Wednesday 10 AM to 5 PM; Thursday 10 AM to 5 PM; Friday 10 AM to 5 PM; Saturday 10 AM to 12:30 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

Speedy Smog accepts Cash, Credit Card.

Speedy Smog has held a BAR smog license since 2026. You can verify the license status at bar.ca.gov.

Speedy Smog 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) 896-9494 for a quote.

Speedy Smog does not take online bookings here, but walk-ins are welcome. Call (209) 896-9494 to check the wait.

Staff at Speedy Smog 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.

Speedy Smog is a Test Only station, so it cannot do the repair. You would have the work done at a repair shop, then come back for the free retest within 30 days. California's Consumer Assistance Program covers up to $1,200 of emissions repairs for qualifying owners.

The closest alternatives in Modesto are The Smog Shop (0.4 mi) and Walkers Automotive (0.5 mi). Both are listed further up this page with their ratings and hours.