Walnut Smog Check Center

Yes. Walnut Smog Check 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. Walnut Smog Check 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.

Walnut Smog Check Center is open Monday 8 AM to 5:30 PM; Tuesday 8 AM to 5:30 PM; Wednesday 8 AM to 5:30 PM; Thursday 8 AM to 5:30 PM; Friday 8 AM to 5:30 PM; Saturday 8 AM to 4 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

Walnut Smog Check Center accepts Cash, Credit Card.

Walnut Smog Check Center has held a BAR smog license since 2023. You can verify the license status at bar.ca.gov.

Walnut Smog Check 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 (909) 594-1913 for a quote.

Walnut Smog Check Center does not take online bookings here, but walk-ins are welcome. Call (909) 594-1913 to check the wait.

Staff at Walnut Smog Check 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.

Walnut Smog Check 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 Walnut are Piedras Smog Test Only (0.3 mi) and D V Smog Pros (0.5 mi). Both are listed further up this page with their ratings and hours.