Check Engine Light
If your check engine light is on, your vehicle will fail the smog test. We can diagnose and repair the issue before testing.
STAR Certified Smog Check
Fast, affordable smog testing in Concord.
We are a STAR Certified station authorized for all smog test types — regular, directed, and gross polluter. Gasoline, diesel, and RV testing available. Starting at $59.75 for 2000+ gasoline vehicles. See our coupon for $49.75.
Smog Check Pricing
Transparent pricing, no surprises
| Vehicle Type | Smog Check | Certificate Fee | Total |
|---|---|---|---|
| 2000 & newer — Gasoline passenger vehicles | $59.75 | $8.25 | $68.00 |
| 2000 & newer — Diesel vehicles | $89.75 | $8.25 | $98.00 |
| 2000 & newer — RVs & large vehicles | $189.75 | $8.25 | $198.00 |
| 1996 – 1999 — Gasoline passenger vehicles | $99.75 | $8.25 | $108.00 |
Certificate fee of $8.25 is mandated by the state of California. Excludes big box trucks. Call for vehicles older than 1996.
What Is a Smog Check?
California requires emissions testing for vehicle registration
A smog check is a California-mandated emissions test that measures your vehicle's exhaust output to ensure it meets state air quality standards. Most vehicles need a smog check every two years for DMV registration renewal, and when transferring ownership.
As a STAR Certified station, Super Station Concord is authorized by the California Bureau of Automotive Repair (BAR) to perform all types of smog inspections — including tests for vehicles directed to a STAR station by the DMV.
Before Your Visit
What to know before your smog check
Battery Disconnect
If your battery was recently disconnected or replaced, the vehicle's readiness monitors may need time to reset. Call ahead so we can advise.
What to Bring
Bring your DMV renewal notice (if available), vehicle registration, and payment. No appointment needed — walk-ins welcome.
Why Choose Us
Concord's trusted STAR smog station since 1990
- STAR Certified — authorized for all DMV-directed tests
- Fast testing — most checks done in under 30 minutes
- Walk-ins welcome — no appointment necessary
- If you fail, we can diagnose and repair on-site
- Honest advice — we will not upsell you on repairs you do not need
Smog Check FAQ
Common questions about smog testing
Most vehicles require a smog check every two years for DMV registration renewal. You also need one when selling or transferring ownership. New vehicles are exempt for the first 8 years in California. Check your DMV renewal notice for specifics.
STAR Certified stations meet higher performance standards set by the California Bureau of Automotive Repair (BAR). Some vehicles are directed by the DMV to STAR-only stations for their smog test. As a STAR station, we can test any vehicle — including directed and gross polluter referrals.
If your vehicle fails, we can diagnose the issue and perform the necessary repairs right here at our shop. You will not need to go to a separate location. Once repairs are complete, we retest at no extra smog check fee. California also offers a Consumer Assistance Program (CAP) that may help cover repair costs for qualifying vehicles.
No — walk-ins are welcome. But calling ahead is the easiest way to confirm current wait times and lane availability, especially during busy periods.
Yes, we can test diesels and RVs. However, pricing differs from the standard $59.75 gasoline passenger vehicle rate. Call us at (925) 685-0101 for a quote on your specific vehicle.