Speedway Smog Center

Yes. Speedway Smog Center 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.

Speedway Smog Center is open Monday 9 AM to 5 PM; Tuesday 9 AM to 5 PM; Wednesday 9 AM to 5 PM; Thursday 9 AM to 5 PM; Friday 9 AM to 5 PM. Closed Saturday and Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

Speedway Smog Center accepts Cash, Credit Card.

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

Speedway Smog Center 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) 529-5925 for a quote.

Speedway Smog Center does not take online bookings here, but walk-ins are welcome. Call (209) 529-5925 to check the wait.

Staff at Speedway Smog Center 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.

Speedway Smog Center 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 Precision Automotive (1.3 mi) and Kruse Lucas Imports Inc (1.4 mi). Both are listed further up this page with their ratings and hours.