FordPartsGiant.com offers the wholesale prices for genuine 2006 Ford Freestar parts. Parts like Air Conditioning System are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.9L OHV EFI NA, 6 Cyl 4.2L OHV EFI. Transmission: 4AT AX4N.