Williams Independent

Yes. Williams Independent 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. Williams Independent 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.

Williams Independent is open Monday 8 AM to 5 PM; Tuesday 8 AM to 5 PM; Wednesday 8 AM to 5 PM; Thursday 8 AM to 5 PM; Friday 8 AM to 5 PM; Saturday 8 AM to 2 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

Yes. Williams Independent accepts walk-ins, so you can drive in without booking ahead.

Williams Independent accepts Credit Card, Debit Card, NFC/Contactless.

Google lists the following accessibility features at Williams Independent: wheelchair accessible entrance, wheelchair accessible parking, wheelchair accessible restroom.

Williams Independent has held a BAR smog license since 2007. You can verify the license status at bar.ca.gov.

Williams Independent 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) 428-6805 for a quote.

Williams Independent does not take online bookings here, but walk-ins are welcome. Call (909) 428-6805 to check the wait.

Staff at Williams Independent 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 Williams Independent 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 Fontana are Smog Latino and George's Sierra Shell (0.3 mi). Both are listed further up this page with their ratings and hours.