MoparPartsGiant.com offers the wholesale prices for genuine 2012 Dodge Durango parts. Parts like Wiring - Chassis & Underbody are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.6L, 8 Cyl 5.7L. Transmission: 5-Speed Automatic Transmission, 6-Speed Automatic Transmission.