United Auto Service

Yes. United Auto Service 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. United Auto Service 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.

United Auto Service is open Monday 8 AM to 6 PM; Tuesday 8 AM to 6 PM; Wednesday 8 AM to 6 PM; Thursday 8 AM to 6 PM; Friday 8 AM to 6 PM. Closed Saturday and Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

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

United Auto Service accepts Cash, Credit Card.

United Auto Service has held a BAR smog license since 1997. You can verify the license status at bar.ca.gov.

United Auto Service 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) 901-8434 for a quote.

United Auto Service does not take online bookings here, but walk-ins are welcome. Call (714) 901-8434 to check the wait.

Staff at United Auto Service 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 United Auto Service 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 Westminster are Smog Tech (0.7 mi) and West Coast Smog (1.6 mi). Both are listed further up this page with their ratings and hours.