Union Service Center

Yes. Union Service 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.

No. Union Service Center 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.

Union Service Center 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 12 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

Union Service Center accepts Credit Card, Debit Card, NFC/Contactless.

Google lists the following accessibility features at Union Service Center: wheelchair accessible entrance, wheelchair accessible parking, wheelchair accessible restroom.

Union Service Center has held a BAR smog license since 2016. You can verify the license status at bar.ca.gov.

Union Service 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 (714) 528-6701 for a quote.

Union Service Center does not take online bookings here, but walk-ins are welcome. Call (714) 528-6701 to check the wait.

Staff at Union Service 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.

Because Union Service Center 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 Fullerton are Fullerton 76 (1.2 mi) and Fullerton Stop N Smog (2.3 mi). Both are listed further up this page with their ratings and hours.