STAR Smog Check in Concord, CA
Registration Due and Need a Smog Check?
If your registration renewal is coming up and you need a smog check, you want a STAR-certified station — not just any shop. In California, vehicles flagged by the DMV as "directed" must be tested at a STAR-certified location. We've been one since the program launched, right here at 1650 Monument Blvd in Concord.
What Makes STAR Certification Different
STAR is the state's higher-tier smog certification. Stations that earn it meet stricter training and equipment standards, and they're authorized to test and repair vehicles that the DMV specifically directs for testing. If your renewal notice says "STAR Station Required," a regular smog shop can't help you — but we can.
We're also licensed to do smog repairs, which matters more than people realize. If your car fails, you don't have to start over somewhere else. We can diagnose why it failed, fix the issue, and retest it — all at the same location.
What a Smog Check Costs Here
- Regular price: $59.75
- With coupon: $49.75 (check our website or just mention it when you call)
- Smog repair diagnosis: $195+ depending on the fault
Most passing tests take 20-30 minutes. If you fail, we'll give you a straight answer on what it'll take to get it through — no runaround.
Common Reasons Cars Fail Smog
- Check engine light is on (an active code is an automatic fail)
- EVAP system leaks
- Failing O2 sensors
- Catalytic converter below efficiency threshold
- Monitors not ready (often happens after a recent battery disconnect)
Q: Can I get a smog check and repair at the same place?
Yes. As a STAR-certified test-and-repair station, we handle both. If your car fails its smog test here, we can diagnose and repair the underlying issue without you having to drive to a separate shop.
A Quick Note on Timing
With Memorial Day just a few days away, it's worth getting your smog handled before the holiday weekend if your registration is close to expiring. We're open Monday through Friday and Saturday mornings — walk-ins are welcome, or call ahead to (925) 685-0101 if you want to check wait times.
Stop by 1650 Monument Blvd, Concord. We've been doing this since 1990 — we'll get you taken care of.