Infiniti vehicles share the Nissan platform and have a solid smog compliance record. The most common failure points are catalytic converter aging on high-mileage VQ35DE V6 models and EVAP system sensitivity on older G35/G37 sedans.
- VQ35DE 3.5L V6 (G35, FX35, QX60 2004-2016): catalytic converter degradation after 150,000+ miles is the documented top failure cause; P0420/P0430 codes
- VK56VD 5.6L V8 (QX80, QX56, Armada): large-displacement V8 with strong emissions compliance; rare failures typically O2 sensor aging after 150,000 miles
- Q50 and Q60 2.0T turbocharged (2016+): direct-injection; moderate carbon buildup at 80,000+ miles
- Infiniti QX50 VC-Turbo 2.0L variable compression (2019+): innovative engine with strong emissions compliance; very limited smog failure history
- G35/G37 EVAP system: charcoal canister and gas cap aging causes P0441/P0442 on older models
- Infiniti QX60 hybrid (2014-2015): OBD-II-only smog; drive 30+ miles before testing
Per BAR inspection data and Nissan/Infiniti TSB documentation.