Smog Checks
New Customer Special – Limited Time Only | $25 OFF any service
(any service of $100 or more)
Licensed Vehicle Emissions Testing You Can Trust
We offer a simple promise: Pass your smog check or receive a free retest when we complete the necessary repairs.
If you need reliable smog checks in Mission Viejo, CA, our licensed station provides fast, accurate vehicle emissions testing in full compliance with California regulations. We proudly serve drivers throughout Orange County with professional inspections and repair support when needed.
The California Smog Check Program plays a critical role in improving air quality across the state. By identifying vehicles with excess emissions, the program ensures necessary repairs are completed to reduce pollution and protect public health.
Most smog checks take approximately 20–30 minutes and are completed by our qualified technicians.
When Are Smog Checks Required?
In California, smog checks are generally required:
Every two years for vehicles more than eight model years old.
When selling a vehicle more than four model years old.
When registering an out-of-state vehicle for the first time in California.
Vehicles That May Be Exempt
Your vehicle may not require a smog inspection if it is:
A gasoline-powered vehicle less than four model years old.
A 1997 or older diesel vehicle.
A diesel vehicle over 14,000 pounds gross vehicle weight.
Fully electric.
If you are unsure about your vehicle’s requirements, our team in Mission Viejo can help clarify what applies to your registration.
What Is Included in a Smog Check?
Smog checks measure the amount and type of pollutants your vehicle emits. Depending on the vehicle, testing may include:
- • Visual inspection of emission control components
- • Functional inspection of the check engine light
- • Testing of ignition timing and exhaust gas recirculation systems
- • Inspection of the fuel evaporative system and gas cap
- • On-Board Diagnostic (OBD) system evaluation
- • Tailpipe emissions testing when applicable
All inspections are conducted in accordance with guidelines set by the California Bureau of Automotive Repair (BAR).
Frequently Asked Questions About Smog Checks
How long is a Smog Check certificate valid?
When your vehicle passes, an electronic certificate is sent directly to the DMV. The certificate is valid for 90 days.
How can I improve my chances of passing?
Routine maintenance is essential. Address check engine lights promptly, avoid tampering with emissions systems, and follow your manufacturer’s service recommendations. If your check engine light is flashing, seek immediate service.
What is a pre-test?
A pre-test is an unofficial inspection performed before the official smog check. It helps identify potential issues before certification.
What is a Directed Vehicle?
Some vehicles are required by state law to test at a STAR-certified station. This may occur due to emissions history or random program selection.
What is a Vehicle Inspection Report (VIR)?
After your smog check, you will receive a VIR detailing the inspection results. While the DMV receives your certificate electronically, you should keep the VIR for your records.
What if my vehicle fails?
If your vehicle does not pass, our team can explain the reason and provide repair services to help you meet California emission standards. Once repairs are completed at our facility, you qualify for a free retest.
Convenient Smog Checks in Orange County
Our Mission Viejo smog check station is fully licensed and equipped to handle your emissions testing quickly and efficiently. Whether you are renewing registration, transferring ownership, or registering a vehicle from out of state, we make the process straightforward.
Contact us today to schedule your smog check in Mission Viejo, CA and keep your vehicle compliant with California emissions standards.
Trust A-Z Tech Automotive For all your Car Repair and Vehicle Maintenance Services!
Call us at (949) 472-8111
OR