STAR certifiedUnion CityFast service

Union City smog check. Done fast.

Test-only inspections from a family-owned local station. Most cars are done in 15 to 20 minutes.

Call now Get directions

Black Ferrari 360 in front of the Union City Smog Check building, with the blue Smog Check sign and STAR Certified banner — Mon-Fri 9:30 AM-5 PM, Sat 9:30 AM-3 PM
33365 Mission Blvd.
Union City, CA 94587

Family owned: Since 2012
Certified station: STAR
No appointment needed: Walk-ins
Open Monday–Saturday: 6days

In. Tested. Back on the road.

Drive in, get tested, and get on with your day. Here's the whole visit.

15–20minutesTypical smog inspection

Black Ferrari F355 inside the Union City Smog Check test bay

Step 1: Arrive
Drive in. No appointment needed.
Step 2: Smog test
A licensed technician runs the inspection.
Step 3: Results
We walk you through them.
Step 4: You're done
Pass, and the certificate goes to the DMV electronically.

STAR certified station

STAR certified smog check.

STAR is California's program for smog check stations that meet higher performance standards set by the Bureau of Automotive Repair.

Some cars must go to a STAR station. The DMV directs certain vehicles, including those more likely to have high emissions, to STAR stations only.
A regular station can't certify them. If your notice asks for a STAR station, only a STAR station's result counts.
We're STAR certified. Directed vehicle or everyday renewal, you can come here.

More about STAR

Black Mercedes-Benz E63 AMG at the Union City Smog Check bay, under the STAR Certified Smog Check Station banner

Smog certification required at a STAR station

See this line on your renewal notice? We can certify your car.

Real customers. Real cars.

Union City Smog Check is a family-owned, STAR-certified, test-only smog check station on Mission Blvd. in Union City, California. Since 2012, daily drivers, trucks, SUVs and sports cars have all come through the same test bay.

Gray BMW M2 at the Union City Smog Check bay, with the STAR Certified banner and business hours sign — BMW M2

Black Porsche 911 GT3 outside the Union City Smog Check STAR certified bay — Porsche 911 GT3

Tan Toyota Tacoma pulling into the Union City Smog Check bay — Toyota Tacoma

Red Honda S2000 in front of the Union City Smog Check bay, under the STAR Certified Smog Check Station banner — Honda S2000

White Toyota 4Runner pulling into the Union City Smog Check test bay — Toyota 4Runner

Yellow Toyota MR2 at the Union City Smog Check test bay — Toyota MR2

Test only
We don't sell repairs, so there's nothing to upsell.
Free retest
If your car doesn't pass, the retest is on us.
One flat price
No hidden fees. Call for the current price.

See what customers say

Before your smog check.

A quick check before you drive over can save you a second trip.

All prep tips

Check engine light is off
If the check engine light is on, your car will not pass. The light means the car’s computer has found a problem, usually in the emissions system.
More on this
No recent battery change or jump start
Disconnecting or replacing the battery, a jump start, or clearing trouble codes resets the car’s built-in self-tests, called readiness monitors. If they haven’t finished, the car can’t pass yet.
More on this
Emissions parts original or approved
Every smog check includes a look at your emissions equipment. If a part has been removed, disconnected, or replaced with an aftermarket part that isn’t approved by the California Air Resources Board (CARB), the car won’t pass.
More on this
Engine running smoothly
If the engine idles rough, hesitates, misfires, smokes, or you can smell fuel, have it checked before the smog test. These problems often cause a fail even when the dashboard looks fine.
More on this
Tires at the right pressure
Most 2000 and newer vehicles are tested through the onboard computer. Many older vehicles get a tailpipe test, which can involve driving the car on a dynamometer (a set of rollers). Tires at the pressure listed on the driver’s door jamb help that test run smoothly.
More on this
DMV renewal notice, if you have one
If you have a DMV registration renewal notice, bring it along. It shows whether your vehicle needs a smog check and whether it must go to a STAR station. Your results are sent to the DMV electronically.
More on this

Do I need a smog check?

Quick answers to what most drivers ask. For the full picture, read our guide.

Read the smog check guide

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.

STAR smog check explained

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.