Mchenry Smog Center

Yes. Mchenry Smog Center 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.

Yes. Mchenry 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.

Mchenry Smog Center is open Monday 8:30 AM to 5 PM; Tuesday 8:30 AM to 5 PM; Wednesday 8:30 AM to 5 PM; Thursday 8:30 AM to 5 PM; Friday 8:30 AM to 5 PM; Saturday 8:30 AM to 5 PM; Sunday 8:30 AM to 1 PM. Hours can change on holidays, so call ahead if you are cutting it close.

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

Mchenry Smog Center accepts Cash, Credit Card.

Mchenry Smog Center has held a BAR smog license since 2004. You can verify the license status at bar.ca.gov.

Mchenry 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) 544-2944 for a quote.

Mchenry Smog Center does not take online bookings here, but walk-ins are welcome. Call (209) 544-2944 to check the wait.

Staff at Mchenry 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.

Mchenry 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 Modesto Mazda (0.6 mi) and Audi Modesto (0.7 mi). Both are listed further up this page with their ratings and hours.