Diaz Smog Test Only

Yes. Diaz Smog Test Only 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. Diaz Smog Test Only 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.

Diaz Smog Test Only is open Monday 8:30 AM to 6 PM; Tuesday 8:30 AM to 6 PM; Wednesday 8:30 AM to 6 PM; Thursday 8:30 AM to 6 PM; Friday 8:30 AM to 6 PM; Saturday 8:30 AM to 4 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

Diaz Smog Test Only accepts Credit Card, Debit Card, NFC/Contactless.

Google lists the following accessibility features at Diaz Smog Test Only: wheelchair accessible entrance, wheelchair accessible parking.

Diaz Smog Test Only has held a BAR smog license since 2011. You can verify the license status at bar.ca.gov.

Diaz Smog Test Only 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) 514-0905 for a quote.

Diaz Smog Test Only does not take online bookings here, but walk-ins are welcome. Call (909) 514-0905 to check the wait.

Staff at Diaz Smog Test Only 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.

Diaz Smog Test Only 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 Colton are Oscar's Auto Care & Smog Services and D&b Smog & Automotive Repair (0.2 mi). Both are listed further up this page with their ratings and hours.