NissanPartsDeal.com offers the wholesale prices for genuine 2008 Nissan Altima Sedan parts. Parts like Transmission Gear are shipped directly from authorized Nissan dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.5L, 6 Cyl 3.5L. Trim: Base, S, SE, SL, SR.