Smog check questions, answered.
Can't find your answer? Call (510) 441-9800. We're happy to help.
Visiting us
Where can I get a STAR smog check in Union City?
At Union City Smog Check, 33365 Mission Blvd., Union City, CA 94587. We're a STAR-certified, test-only smog check station, open Monday to Friday, 9:30 AM to 5 PM; Saturday, 9:30 AM to 3 PM. Walk-ins are welcome.
Is Union City Smog Check STAR certified?
Yes. Union City Smog Check is a STAR-certified, test-only station licensed by the California Bureau of Automotive Repair (station license TC 282011). We can certify vehicles the DMV directs to a STAR station.
How long does a smog check take?
Most smog checks here take 15 to 20 minutes. The exact time depends on the vehicle.
Do I need an appointment?
No. Walk-ins are welcome during business hours. If you're short on time, call (510) 441-9800 ahead and we'll do our best to get you in and out faster.
What are your hours?
We're open Monday to Friday, 9:30 AM to 5 PM; Saturday, 9:30 AM to 3 PM. We're closed on Sunday.
Where are you located?
33365 Mission Blvd., Union City, CA 94587. We're on Mission Blvd. near Whipple Rd., a short drive from Fremont and Hayward.
What should I bring?
Your vehicle and your DMV renewal notice, if you have one. The notice shows whether your car needs a smog check this year and whether it must go to a STAR station.
How much does a smog check cost?
Call (510) 441-9800 for the current price. We charge one flat price with no hidden fees.
Is there a free retest?
Yes. If your vehicle doesn't pass, the retest here is free.
Do you do repairs?
No. We're a test-only station: we inspect and certify, but don't sell repairs, so there's no reason to fail a car to win a repair job.
Smog check rules
Do I need a smog check?
In California, most gasoline, hybrid and alternative-fuel vehicles from model year 1976 and newer need a smog check every other year to renew registration. Diesel vehicles from 1998 and newer with a gross vehicle weight rating of 14,000 pounds or less also need one. Vehicles eight model years old or newer are exempt at renewal.
My DMV notice says a STAR station is required. Can you help?
Yes. Union City Smog Check is STAR certified. Only a STAR station can certify a vehicle whose renewal notice says a STAR station is required.
Do I need a smog check to sell my car?
Usually, yes. In California the seller provides a smog certificate, and the buyer needs one from within the last 90 days. Vehicles four model years old or newer, and transfers between immediate family members, are exempt.
How long is a smog certificate good for?
A smog certificate is sent to the DMV electronically and is valid for 90 days.
What happens if my car fails?
You'll get your results and can have the car repaired at a licensed repair station. Some emissions repairs are covered by warranty, and the state's Consumer Assistance Program may help pay for repairs. When you come back, the retest here is free.
How should I prepare my car for a smog check?
Make sure the check engine light is off, drive for a week or two after a battery change or jump start, and make sure any aftermarket emissions parts are CARB approved. See our smog check prep tips for details.
Mon-Fri 9:30 AM-5 PM, Sat 9:30 AM-3 PM
Still have a question? Just call.
33365 Mission Blvd., Union City.