FordPartsGiant.com offers the wholesale prices for genuine 1999 Mercury Mountaineer parts. Parts like Emission System - Exhaust Gas Recirculation (E.G.R.) - Hoses & Tubes are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 5.0L. Transmission: 4AT 4R70W.