MoparPartsGiant.com offers the wholesale prices for genuine 2003 Dodge Ram 1500 parts. Parts like Sensors - Drivetrain 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, 8 Cyl 4.7L, 8 Cyl 5.7L, 8 Cyl 5.9L. Transmission: 4-Speed Automatic Transmission, 5-Speed Automatic Transmission, 5-Speed Manual Transmission, Multi-Speed Automatic Transmission.