Every California smog check term and question, plainly defined
What should I know about Acura smog checks in California?
Acura vehicles share the Honda platform and have a strong first-pass smog compliance record. The primary watch points are VTEC-related EVAP codes on older MDX and RDX models, and Type S turbocharged engines that may have carbon buildup on high-mileage examples.
MDX 3.5L V6 (2014-2021): reliable; EVAP system aging (purge valve, gas cap O-ring) causes P0441/P0442 on high-mileage examples
RDX 2.0T turbocharged (2019+): direct-injection VTEC Turbo engine; moderate carbon buildup risk at 80,000+ miles
TLX 2.0T and Type S 3.0T (2021+): direct-injection twin-turbo V6; early generation with strong emissions compliance record so far
Acura Integra 1.5T (2023+): same 1.5L VTEC Turbo as Civic Si; good emissions compliance; direct-injection carbon buildup at 80,000+ miles
Older MDX and RDX with VTEC 3.5L V6 (2003-2013): catalytic converter aging on very high mileage examples; P0420 on 200,000+ mile MDX is documented
Acura ZDX EV (2024+, BEV): fully exempt from emissions testing — no inspection required
Per BAR inspection data and Honda/Acura TSB documentation.