The 2003 Infiniti G35 is available as a 4-door, 5-seat sedan. Starting at $27,800, the 2003 Infiniti G35 Luxury (A5) Sedan is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 24-mpg on the highway. The top of the line 2003 Infiniti G35 Luxury Leather (EOP August 2002) (A5) Sedan, priced at $28,950, is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 24-mpg on the highway.