Audi A4 Smog Check
Audi A4 (gas) in California requires a standard biennial smog inspection at any BAR-licensed station. Key tip: 2.0T carbon buildup affects emissions; drive 30-50 miles before testing.
Smog tips for Audi A4 owners
2.0T carbon buildup affects emissions; drive 30-50 miles before testing.
For full Audi smog requirements, including hybrid + PHEV + BEV variants, see our Audi smog check guide.
Common questions
Where can I get a smog check for my Audi A4?
Any of our 15 BAR-licensed STAR-certified locations in San Diego, Riverside, Orange, and Los Angeles counties handle Audi A4 smog inspections. Walk-ins welcome — 15-25 minute inspections. Same-day DMV cert filing.
What's the common reason a Audi A4 fails smog?
2.0T carbon buildup affects emissions; drive 30-50 miles before testing.
How much does a Audi A4 smog check cost?
$55-$85 plus the $8.25 California state certificate fee. Audi A4 hybrid + PHEV variants are same pricing. BEV (100% electric) variants are exempt — no cost.
Is the Audi A4 exempt from California smog?
Only 100% battery-electric variants are exempt. Hybrid and plug-in hybrid Audi A4 models still need biennial smog inspection. Gasoline-only versions follow standard rules — required every 2 years for vehicles 8+ years old.
Where to bring your Audi A4
All 15 locations handle Audi A4 smog. STAR-certified test+repair locations recommended for diagnosing any issues.