California Smog Check Network
13 STAR-certified locations across San Diego, Los Angeles, Orange, and Riverside counties. Walk in any time. Same-day electronic DMV certificate filing. 15-25 minute average inspection.
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Do you even need a smog check?
Tap what you drive — get your answer and your soonest time by text. 10 seconds.
Valid at any of our 13 locations.
By texting SMOG, you agree to receive SMS messages about smog check appointments and customer care from California Smog Check Network. Message frequency varies. Msg & data rates may apply. Reply STOP to opt out, HELP for help. Privacy · Terms.
Find Your Nearest Shop
Pick the location closest to you. Walk in any time during business hours — no appointment needed.
Carlsbad Auto Repair
Where Carlsbad drivers come when smog fails and they want it fixed today.
Carlsbad STAR Smog
The fastest, friendliest Carlsbad smog check.
Encinitas STAR
Encinitas's combined smog + repair on the main road.
LA STAR Smog
LA's downtown STAR smog station on Olympic Blvd — bilingual, walk-in.
SD STAR Smog
San Diego's Golden Hill STAR smog station — walkable, walk-in.
Garden Grove STAR
Garden Grove's bilingual STAR smog station — Little Saigon-friendly.
APEX Temecula
The off-the-freeway smog stop for Temecula + wine-country commuters.
Muffler & Cat
Escondido's exhaust + catalytic converter specialist.
Oceanside Auto
Oceanside's family-trusted Mission Avenue smog + repair shop.
Oceanside STAR Smog
Oceanside's no-upsell, no-appointment STAR smog check on Mission Ave.
Smog Check Escondido
Escondido's primary STAR test-only smog station — N. Escondido Blvd.
Escondido Auto
Escondido's repair anchor for the local smog cluster.
Escondido Valley STAR
Escondido's East Valley Parkway STAR smog station.
Why drivers choose us
Four reasons the network has earned 7,335+ Google reviews at an average 4.8 stars.
★ STAR-certified inspection
STAR stations are independently verified by California BAR to perform inspections at higher standards. Required for DMV-directed retests + gross polluter recertification. Most of our 13 locations are STAR-certified.
⚡ Same-day DMV filing
California switched to electronic certificate filing in 2010. We file your smog cert with DMV within hours of passing. No mailing, no waiting. You can pay your registration online the same day.
🚶 Walk-ins welcome
Most inspections take 15-25 minutes. No appointment required. Pull up during business hours and you'll be in and out before lunch.
🌐 Bilingual service
English + Spanish at every shop. Cultural fluency at our Garden Grove location for the Little Saigon community. Service should feel respectful, not transactional.
Smog check questions, answered
The most common questions from California drivers.
What is a smog check?
State-required emissions inspection. Checks tailpipe and obd systems Biennial for 8-plus year vehicles
How much does a smog check cost in California?
Typical range $30-$90. Star slightly more 8.25 certificate fee separate
How often do I need a smog check in California?
Every two years for most vehicles. At sale or transfer First 8 years exempt for new cars
How long does a smog check take?
Typically 20-30 minutes for standard. 10-15 minutes drive-thru Longer for diesel and hybrid
Do I need an appointment for smog check?
Walk-ins welcome at most stations. Appointments available for convenience Morning slots fill fastest
What do I need to bring for my smog check?
Just the vehicle. We pull DMV renewal info electronically. bring vehicle registration if you have it (helpful but not required) ID not required for inspection
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