Biennial Smog Check
Required every two years for most vehicles in California. Our certified technicians run a full inspection and OBD-II scan to get you back on the road fast.
What We Do
Complete Smog Check Services
From routine inspections to OBD-II diagnostics and retest assistance — we handle it all in one visit.
OBD-II Diagnostics
Check engine light on? We read trouble codes, pinpoint the issue, and explain exactly what's needed — no guessing, no unnecessary repairs.
Smog Certificate Issuance
Pass your test and receive your smog certificate on the spot. Valid for vehicle transfer, registration renewal, or compliance proof — same day, every day.
Retest Assistance
Did you fail elsewhere? Bring your vehicle back and we'll help identify the problem, walk you through needed repairs, and get you certified on the retest.
Express Lane Service
Short on time? Our streamlined process means most inspections are complete in under 30 minutes — pull in, get tested, drive out with your certificate.
Pre-Purchase Inspection
Buying a used car? Get a thorough smog and emissions check before you commit. Know exactly what you're getting before handing over the keys.
How It Works
Three Steps to Your Smog Certificate
We've streamlined the process so you spend minimal time and maximum peace of mind.
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01
Call or Walk In
Give us a call at (714) 537-8474 to schedule, or stop by 10682 Stanford Ave — no appointment necessary for most vehicles.
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02
Inspection & Testing
Our certified technician runs a complete visual inspection and OBD-II emissions test. You'll know the results before anything else is discussed.
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03
Receive Your Certificate
Pass and get your smog certificate on the spot. If repairs are needed, we'll explain clearly and honestly — never push you into anything you don't need.
Why Nelson Smog
Built on Trust, Not Upsells
In a town full of smog stations, here's what makes us the one Garden Grove drivers keep coming back to.
Transparent Pricing, Every Time
You'll know the full cost before we touch your car. No hidden fees, no surprise add-ons, no pressure to buy services you don't need.
State-Certified Technicians
Every inspection is performed by BAR-certified professionals who know California emissions standards inside and out.
Fast Turnaround, Every Visit
Most vehicles are in and out in under 30 minutes. We respect your time because we know life doesn't stop for a smog check.
Honest Answers, No Jargon
We explain results in plain language. If your car needs work, we tell you exactly what and why — so you can make informed decisions.
Convenient Garden Grove Location
Right on Stanford Ave with easy access and parking. Central enough that you won't be driving across town just to get certified.
Retest Support Included
Didn't pass the first time? We help you understand what went wrong and guide you toward the right fix before your retest.
Find Us
Visit Nelson Smog Test Only
Address
10682 Stanford Ave
Garden Grove, CA 92840-5033
Garden Grove, CA 92840-5033
Phone
(714) 537-8474
Hours
Mon – Fri: 8:00 AM – 6:00 PM
Saturday: 9:00 AM – 3:00 PM
Sunday: Closed
Saturday: 9:00 AM – 3:00 PM
Sunday: Closed
