Smog Stop

Yes. Smog Stop 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.

No. Smog Stop is licensed as a Test & Repair station. This station can run your smog test and, if the vehicle fails, diagnose and repair it in the same shop.

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

Smog Stop accepts Cash, Credit Card.

Smog Stop has held a BAR smog license since 2014. You can verify the license status at bar.ca.gov.

Smog Stop 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) 581-1980 for a quote.

Smog Stop does not take online bookings here, but walk-ins are welcome. Call (909) 581-1980 to check the wait.

Staff at Smog Stop 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.

Because Smog Stop is a Test & Repair station, it can diagnose and repair the problem in the same shop, then run the free retest within 30 days. If the repair bill is steep, California's Consumer Assistance Program covers up to $1,200 of emissions repairs for qualifying owners.

The closest alternatives in Rancho Cucamonga are Mr. Smog Check (0.1 mi) and Regatta Smog And Repair (0.2 mi). Both are listed further up this page with their ratings and hours.