1990 Nissan infiniti Used 1990 Infiniti Q45 Sedan Pricing & Features Edmunds Edmunds has detailed price information for the 1990 Infiniti Q45 Sedan. See our 1990 Q45 page for detailed gas mileage information,... Source Source Source Source Source Source Source Source Source Source Read Also: 1990 Nissan infiniti q45 1990 Nissan infiniti m30 1990 Nissan 240sx information 1990 Nissan maxima sedan 1990 Nissan truck information 1990 Nissan stanza value