The 2012 Infiniti G37 cabin air filter stops contaminating particles from making their way into your vehicle's interior. A bad one won't work as effectively, so the climate control system won't blow air as hard, it will run louder, and you might notice bad smells coming from your air vents. You can find the service interval in the owner's manual to catch it before it goes bad. Check out the options for 2012 G37 cabin air filters and buy the best for your vehicle online or at an AutoZone near you.