MoparPartsGiant.com offers the wholesale prices for genuine 2008 Jeep Commander parts. Parts like Engine Oil Pump 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. Transmission: 5-Speed Automatic Transmission.