MoparPartsGiant.com offers the wholesale prices for genuine 2009 Dodge Nitro parts. Parts like Radiator & Related Parts are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.7L, 6 Cyl 4.0L. Transmission: 4-Speed Automatic Transmission, 5-Speed Automatic Transmission, 6-Speed Manual Transmission.