MoparPartsGiant.com offers the wholesale prices for genuine 2007 Dodge Nitro parts. Parts like Service Engine And Suggested 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.