★★★★★
"Highly professional, efficient, and courteous staff. Service is quick — smooth from start to finish. Thorough inspection and attention to detail. Truly phenomenal. Highly recommend!"
TEST ONLY · BAR LICENSED · FULLERTON CA
CLEAN TRUCK CHECK — BY APPOINTMENT
Fullerton
Smog Center
Smog Check · Clean Truck Check (CTC)
537 W. Valencia Dr., Unit C — Fullerton CA 92832
Smog: Walk in anytime · Clean Truck Check: Call to book
Owner Chuck is here every day — we actually answer when you call.
BAR Licensed
Test Only — No Repairs
Walk-ins for Smog
Clean Truck Check (CTC)
All Vehicles
4.8★ Yelp · 584 Reviews
Fast smog. Slow DMV. We're 1 block away.
Handle the quick one first.
Smog Check Services
Regular Smog Check — Walk-ins Welcome
BAR-Licensed. No appointment needed for standard smog checks.
Standard Smog Check
Regular biennial smog certification for most passenger cars and light trucks registered in California. Walk right in.
Diesel Vehicles
Diesel smog testing for trucks, vans, and cars with GVWR under 14,000 lbs. Most shops can't do this — we can.
RVs & Motorhomes
Smog testing for motorhomes and RVs with GVWR under 14,000 lbs. Over 14,000 lbs? That's our CTC service.
BY APPOINTMENT
Clean Truck Check (CTC)
CARB-required for heavy diesel vehicles over 14,000 lbs GVWR. Call to schedule your appointment.
Learn more & bookNot Sure? Just Call
We'll tell you upfront if we can test your vehicle — before you make the drive.
(714) 525-1166
New Service
Book CTC: (714) 525-1166
Clean Truck Check (CTC)
California's mandatory CARB emissions inspection for heavy-duty diesel vehicles over 14,000 lbs GVWR. We're a Credentialed Tester — this is official.
By Appointment Only
Call us to schedule. We'll work around your schedule — Mon through Fri.
Who needs a CTC?
Owner-operators, fleet owners, and commercial carriers with diesel trucks or buses over 14,000 lbs GVWR operating in California.
What's included?
Opacity (smoke) testing, OBD scan, and visual inspection per CARB's Clean Truck Check program requirements.
Full diesel coverage
Under 14k lbs GVWR? Regular smog service (walk-in). Over 14k lbs? CTC by appointment. We cover every diesel vehicle.
Why Choose Us
Honest. Fast. Owner on site every day.
We test — we don't repair. That's the whole point. No conflict of interest, ever.
Multiple Test Lanes
More lanes, shorter waits. In and out fast even on busy days.
No Appointment for Smog
Walk in all day for regular smog checks. CTC by appointment Mon–Fri.
Fully Renovated
We just redid the whole place — new floors, fresh paint, updated bathrooms. Come see it.
1 Block from Fullerton DMV
Get your smog here, walk over and renew. One trip, done.
All Major Cards Accepted
Visa, Mastercard, Discover, Amex. Cash welcome too.
Locally Owned, Owner Operated
Not a chain. The owner is on site every day — personal service, real accountability.
What People Are Saying
Trusted by Thousands of OC Drivers
★★★★★
"Going here for years — no appointment. When I didn't pass, Seung showed me the exact part I needed (a few dollars at any auto parts store). Saved me from an overpriced repair. Returned, passed!! Honest and very reasonably priced!"
★★★★★
"Super quick — they even pointed out my car had a safety recall. That level of genuine concern goes well beyond what any business needs to do."
★★★★★
"Great and friendly service — in and out in no time. Very friendly staff. I would advise anybody to go here. Very pleased!"
★★★★★
"Excellent service by Chuck and his technician. My 1999 Chevy Silverado passed in about 20 minutes. Polite and courteous. Worth the drive — I'd recommend them to anyone!"
★★★★★
"If you want friendly service, this is the place to go. And if you get a coupon from the website, you can get a discount."
Show & Save
Call: (714) 525-1166
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Fullerton Smog Center
537 W. Valencia Dr., Unit C · Fullerton CA · (714) 525-1166
Not valid for CTC · Cannot combine.
Find Us
Fullerton, California 92832
1 block east of Fullerton DMV
Location & Hours
Address
537 W. Valencia Dr., Unit CFullerton, California 92832
1 block east of Fullerton DMV
Hours
- Monday – Friday
- 9:00 AM – 5:00 PM
- Saturday
- 8:30 AM – 3:30 PM
- Sunday
- Closed
Clean Truck Check — Mon–Fri by appointment only
Phone
(714) 525-1166
Questions
Frequently Asked Questions
Smog checks, Clean Truck Check, pricing — all your questions answered.