★★★★★
"Courteous and friendly and efficient staff. I would recommend this smog station to anyone who needs the smog certification. The best!!"
STAR CERTIFIED · TEST ONLY · 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 · 596 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.
★★★★★
"Great experience! I shopped around for several quotes, and this place was the cheapest. I walked in without an appointment and was in and out in 10 mins. 10/10 would recommend!"
★★★★★
"Great experience, owner is there and always taking care of the clients and their experience. Will definitely be coming back!"
★★★★★
"Fast, efficient, reasonable cost. … I called about 4 spots to get quotes and with the website coupon, this place was the best price. No appointment needed. Very friendly staff (like, EVERYONE was smiling and helpful)"
★★★★★
"Super quick and friendly. Great value comparing to other shops. In and out in 10 mins"
★★★★★
"I had a great experience with Chuck. The price was very reasonable compared with other places I checked, and the whole process was quick, straightforward, and hassle-free. Chuck was friendly, professional, and actually took the time to explain everything instead of just rushing me through."
★★★★★
"Compared to other auto shops in the area, Chuck provided me with a great rate for the smog. I drove over to have it taken care of and didn't wait more than 15 minutes. Thank you so much Chuck!"
★★★★★
"Best price in town. Paid $20 less than every other quote. Great friendly service. Thank you!"
★★★★★
"Today I didn't pass the smog because a vacuum line hose was dried and cracked. Seung took the time to show me the part I needed to replace … Saved me from getting ripped off on an over priced repair … Returned to re test and passed!! Best place ever to get a smog cert. Honest and very reasonably priced!"
Show & Save
Call: (714) 525-1166
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Fullerton Smog Center
537 W. Valencia Dr., Unit C · Fullerton CA · (714) 525-1166
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Find Us
Fullerton, California 92832
1 block east of Fullerton DMV Get Directions
Location & Hours
Address
537 W. Valencia Dr., Unit CFullerton, California 92832
1 block east of Fullerton DMV Get Directions
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.